Bump CommunityToolkit.Mvvm in /templates/Avalonia/AvaloniaSolution (#196

)

Bumps [CommunityToolkit.Mvvm](https://github.com/CommunityToolkit/dotnet) from 8.3.1 to 8.3.2.
- [Release notes](https://github.com/CommunityToolkit/dotnet/releases)
- [Commits](CommunityToolkit/dotnet@v8.3.1...v8.3.2)

---
updated-dependencies:
- dependency-name: CommunityToolkit.Mvvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

templates/Avalonia/AvaloniaSolution/Directory.Packages.props

@@ -32,7 +32,7 @@
     <PackageVersion Include="Avalonia.iOS" Version="$(AvaloniaVersion)" />
     <PackageVersion Include="Avalonia.Themes.Fluent" Version="$(AvaloniaVersion)" />
 
-    <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.3.1" />
+    <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.3.2" />
 
     <PackageVersion Include="Xamarin.AndroidX.Core.SplashScreen" Version="1.0.1.6" />
   </ItemGroup>