Bump the dotnet group across 1 directory with 4 updates

Bumps the dotnet group with 4 updates in the /docs/core/whats-new/snippets/dotnet-8/csharp/ConsoleApp directory: [Microsoft.Extensions.Diagnostics.Testing](https://github.com/dotnet/extensions), [Microsoft.Extensions.Hosting](https://github.com/dotnet/runtime), [Microsoft.Extensions.Hosting.Abstractions](https://github.com/dotnet/runtime) and [MSTest.TestFramework](https://github.com/microsoft/testfx).


Updates `Microsoft.Extensions.Diagnostics.Testing` from 8.9.1 to 9.0.0
- [Release notes](https://github.com/dotnet/extensions/releases)
- [Commits](dotnet/extensions@v8.9.1...v9.0.0)

Updates `Microsoft.Extensions.Hosting` from 8.0.0 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.0...v9.0.0)

Updates `Microsoft.Extensions.Hosting.Abstractions` from 8.0.0 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.0...v9.0.0)

Updates `MSTest.TestFramework` from 3.6.0 to 3.6.4
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.6.0...v3.6.4)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Diagnostics.Testing
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Hosting
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Hosting.Abstractions
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
- dependency-name: MSTest.TestFramework
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

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

Author: dependabot[bot]

docs/core/whats-new/snippets/dotnet-8/csharp/ConsoleApp/Project.csproj

@@ -9,10 +9,10 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
-    <PackageReference Include="Microsoft.Extensions.Diagnostics.Testing" Version="8.9.1" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.6.0" />
+    <PackageReference Include="Microsoft.Extensions.Diagnostics.Testing" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="9.0.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.6.4" />
   </ItemGroup>
 
 </Project>