fix: remove 4-byte emoji from changelog (app store rejected upload with 500)

The Nextcloud app store stores parsed CHANGELOG content in a database
column that does not accept 4-byte UTF-8; the paperclip emoji in the
v2.29.0 attachments entry crashed the release upload server-side.
Replaced with plain text.

Author: otherworld-dev

budget/CHANGELOG.md

@@ -21,7 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Nextcloud dashboard widgets**: "Upcoming bills" (next five bills due within 60 days, with overdue/due-today wording) and "Overview" (total balance, this month's budget progress, and an attention line for over-budget categories) — enable them via Customize on the Nextcloud dashboard
 - **Unified search**: transactions (description, vendor, notes — own and shared accounts) now appear in Nextcloud's global search bar; clicking a result opens the Transactions view with the search pre-filled
 - **Bills calendar feed**: subscribe to your bills from Nextcloud Calendar, phones, or Thunderbird via a token-authenticated ICS feed (Bills > Calendar feed). Occurrences are materialized 12 months ahead — including custom recurrence patterns, semi-monthly schedules, end dates and remaining-payment limits — and bill reminders become calendar alarms. The token can be regenerated at any time; failed token guesses are rate-limited and brute-force protected
-- **Receipt attachments**: attach receipts/invoices (JPEG, PNG, WebP, HEIC, PDF — up to 25 MB) to transactions from the edit dialog — upload into `Budget/Receipts/<year>/` or pick an existing file from your Files. Files stay in your own Files space (quota, backups, ownership); the app stores only a reference and never deletes files. Transactions with receipts show a 📎 badge; image attachments get thumbnails; renames/moves in Files are followed automatically and deleted files are shown as missing instead of breaking
+- **Receipt attachments**: attach receipts/invoices (JPEG, PNG, WebP, HEIC, PDF — up to 25 MB) to transactions from the edit dialog — upload into `Budget/Receipts/<year>/` or pick an existing file from your Files. Files stay in your own Files space (quota, backups, ownership); the app stores only a reference and never deletes files. Transactions with receipts show a paperclip badge; image attachments get thumbnails; renames/moves in Files are followed automatically and deleted files are shown as missing instead of breaking
 - Deep links into the app (`#/transactions`, `#/bills`, …) are now honored on page load, including a pre-filled transaction search (`#/transactions?search=…`)
 
 ### Fixed