docs(hosting): add ext-xmlreader to required PHP extensions (#2307)

The Shopware core relies on \XMLReader (used by SvgContentValidator).
ext-xmlreader is a core PHP extension but has its own configure flag,
so minimal PHP builds can omit it. Listing it explicitly in the hosting
requirements keeps the docs aligned with the composer manifests.

Relates shopware/shopware#16961
Relates shopware/shopware#17020

Author: MartinKrzykawski

guides/hosting/index.md

@@ -14,7 +14,7 @@ The following versions and configurations are officially supported for Shopware
 
 | Component            | Install                                                                                                                                                                                                                                                                                                                            | Minimum Version                                                                                                                      | Recommended              | Required / Notes                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
 |:---------------------|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-------------------------------------------------------------------------------------------------------------------------------------|:-------------------------|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| **PHP**              | [PHP installation guide](https://www.php.net/manual/en/install.php)<br>[Composer installation guide](https://getcomposer.org/download/)                                                                                                                                                                                            | 8.2+                                                                                                                                 | 8.4                      | **Required.**<br>`memory_limit ≥ 512M`, `max_execution_time ≥ 30s`.<br>Required extensions: `ctype`, `curl`, `dom`, `fileinfo`, `gd`, `iconv`, `intl`, `mbstring`, `openssl`, `pcre`, `pdo_mysql`, `phar`, `simplexml`, `xml`, `zip`, `zlib`.<br>Optional: `amqp` (for message queues).<br>Composer 2.2+ recommended.<br>**macOS note:** If you install PHP with Homebrew, the `intl` extension may not be included by default. Install it separately:<br>`brew install php-intl` then verify with `php -m | grep intl`. |
+| **PHP**              | [PHP installation guide](https://www.php.net/manual/en/install.php)<br>[Composer installation guide](https://getcomposer.org/download/)                                                                                                                                                                                            | 8.2+                                                                                                                                 | 8.4                      | **Required.**<br>`memory_limit ≥ 512M`, `max_execution_time ≥ 30s`.<br>Required extensions: `ctype`, `curl`, `dom`, `fileinfo`, `gd`, `iconv`, `intl`, `mbstring`, `openssl`, `pcre`, `pdo_mysql`, `phar`, `simplexml`, `xml`, `xmlreader`, `zip`, `zlib`.<br>Optional: `amqp` (for message queues).<br>Composer 2.2+ recommended.<br>**macOS note:** If you install PHP with Homebrew, the `intl` extension may not be included by default. Install it separately:<br>`brew install php-intl` then verify with `php -m | grep intl`. |
 | **SQL**              | [MariaDB installation guide](https://mariadb.com/kb/en/getting-installing-and-upgrading-mariadb/)<br>[MySQL installation guide](https://dev.mysql.com/doc/mysql-installation-excerpt/8.0/en/)                                                                                                                                      | MariaDB ≥ 10.11.6 or MySQL ≥ 8.0.22 (Innovation releases are not supported)                                                                                                  | MariaDB 11.4 / MySQL 8.4 | **Required.**<br>`max_allowed_packet ≥ 32M` for optimal performance.                                                                                                                                                                                                                                                                                                                                                                                                                                       |
 | **Node.js / npm**    | [Node.js downloads](https://nodejs.org/en/download)                                                                                                                                                                                                                                                                                | Node 20.0.0+                                                                                                                         | Node 24 / npm 10         | **Required.**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | **Search**           | [OpenSearch installation guide](https://opensearch.org/docs/latest/install-and-configure/install-opensearch/index/)                                                                                                                                                                                                                | OpenSearch 1.0+ or ElasticSearch 7.8+                                                                                                | OpenSearch 2.17.1        | **Optional.** Used for product search and indexing. <br> **Note**: The search preview in the administration requires OpenSearch 2.12+ or Elasticsearch 8.8+. <br> Support for OpenSearch 3.1 was added in shopware v6.7.3.1                                                                                                                                                                                                                                                                                              |