Bump the dotnet group (#45680)

Bumps the dotnet group in /docs/core/whats-new/snippets/dotnet-8/csharp/ConsoleApp with 3 updates: [Microsoft.Extensions.Diagnostics.Testing](https://github.com/dotnet/extensions), [Microsoft.Extensions.Hosting](https://github.com/dotnet/runtime) and [Microsoft.Extensions.Hosting.Abstractions](https://github.com/dotnet/runtime).


Updates `Microsoft.Extensions.Diagnostics.Testing` from 9.3.0 to 9.4.0
- [Release notes](https://github.com/dotnet/extensions/releases)
- [Commits](dotnet/extensions@v9.3.0...v9.4.0)

Updates `Microsoft.Extensions.Hosting` from 9.0.3 to 9.0.4
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.3...v9.0.4)

Updates `Microsoft.Extensions.Hosting.Abstractions` from 9.0.3 to 9.0.4
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.3...v9.0.4)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Diagnostics.Testing
  dependency-version: 9.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Hosting
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Hosting.Abstractions
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

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

Author: dependabot[bot]

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

@@ -9,9 +9,9 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.0" />
-    <PackageReference Include="Microsoft.Extensions.Diagnostics.Testing" Version="9.3.0" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.3" />
-    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="9.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Diagnostics.Testing" Version="9.4.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.4" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="9.0.4" />
     <PackageReference Include="MSTest.TestFramework" Version="3.8.3" />
   </ItemGroup>