build(deps): bump CommunityToolkit.Mvvm from 8.2.2 to 8.3.1

Bumps [CommunityToolkit.Mvvm](https://github.com/CommunityToolkit/dotnet) from 8.2.2 to 8.3.1.
- [Release notes](https://github.com/CommunityToolkit/dotnet/releases)
- [Commits](CommunityToolkit/dotnet@v8.2.2...v8.3.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="Autofac.Extensions.DependencyInjection" Version="9.0.0" />
     <PackageVersion Include="CommunityToolkit.Common" Version="8.2.2" />
     <PackageVersion Include="CommunityToolkit.Diagnostics" Version="8.2.2" />
-    <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.2.2" />
+    <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.3.1" />
     <PackageVersion Include="CommunityToolkit.WinUI.Animations" Version="8.0.240109" />
     <PackageVersion Include="CommunityToolkit.WinUI.Behaviors" Version="8.0.240109" />
     <PackageVersion Include="CommunityToolkit.WinUI.Controls.HeaderedControls" Version="8.0.240109" />