Bump CommunityToolkit.Mvvm from 8.4.0 to 8.4.2 (#152)

---
updated-dependencies:
- dependency-name: CommunityToolkit.Mvvm
  dependency-version: 8.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/HotChocolateGraphQL.Mobile/HotChocolateGraphQL.Mobile.csproj

@@ -55,7 +55,7 @@
     <PackageReference Include="CommunityToolkit.Maui" Version="12.3.0" />
     <PackageReference Include="CommunityToolkit.Maui.Markup" Version="5.1.0" />
     <PackageReference Include="StrawberryShake.Maui" Version="14.3.0" />
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.2" />
     <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="9.0.0" />
   </ItemGroup>