Bump Avalonia from 11.3.12 to 11.3.13 (#1989)

---
updated-dependencies:
- dependency-name: Avalonia
  dependency-version: 11.3.13
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

Directory.Packages.props

@@ -16,7 +16,7 @@
     <PackageVersion Include="xunit.v3" Version="3.2.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <!-- After an upgrade of these libraries the nuspec file should also be updated -->
-    <PackageVersion Include="Avalonia" Version="11.3.12" />
+    <PackageVersion Include="Avalonia" Version="11.3.13" />
     <PackageVersion Include="System.Drawing.Common" Version="8.0.22" />
   </ItemGroup>
 </Project>