Merged PR 62358: Bump servicing version for System.Security.Cryptography.Xml

Bump servicing version for System.Security.Cryptography.Xml

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#### AI description  (iteration 1)
#### PR Classification
Version bump to increment the servicing version number for the System.Security.Cryptography.Xml package and enable package generation.

#### PR Summary
This pull request increments the servicing version from 3 to 4 and enables package generation on build for the System.Security.Cryptography.Xml library.

- `System.Security.Cryptography.Xml.csproj`: Bumped `ServicingVersion` from 3 to 4 and set `GeneratePackageOnBuild` to `true`
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: eiriktsarpalis

src/libraries/System.Security.Cryptography.Xml/src/System.Security.Cryptography.Xml.csproj

@@ -4,8 +4,8 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <NoWarn>$(NoWarn);CA1850</NoWarn> <!-- CA1850 suppressed due to multitargeting -->
     <IsPackable>true</IsPackable>
-    <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-    <ServicingVersion>3</ServicingVersion>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <ServicingVersion>4</ServicingVersion>
     <PackageDescription>Provides classes to support the creation and validation of XML digital signatures. The classes in this namespace implement the World Wide Web Consortium Recommendation, "XML-Signature Syntax and Processing", described at http://www.w3.org/TR/xmldsig-core/.
 
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