Bump the dotnet group (dotnet#43750)

Bumps the dotnet group in /docs/ai/quickstarts/snippets/build-chat-app/openai with 3 updates: [Microsoft.Extensions.AI.OpenAI](https://github.com/dotnet/extensions), [Microsoft.Extensions.Configuration](https://github.com/dotnet/runtime) and [Microsoft.Extensions.Configuration.UserSecrets](https://github.com/dotnet/runtime).


Updates `Microsoft.Extensions.AI.OpenAI` from 9.0.0-preview.9.24525.1 to 9.0.0-preview.9.24556.5
- [Release notes](https://github.com/dotnet/extensions/releases)
- [Commits](https://github.com/dotnet/extensions/commits)

Updates `Microsoft.Extensions.Configuration` 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.Configuration` 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.Configuration.UserSecrets` 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)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.AI.OpenAI
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Configuration
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Configuration
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
- dependency-name: Microsoft.Extensions.Configuration.UserSecrets
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
...

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

docs/ai/quickstarts/snippets/build-chat-app/openai/ExtensionsOpenAI.csproj

@@ -8,9 +8,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.0.0-preview.9.24525.1" />
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.0.0-preview.9.24556.5" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.0" />
   </ItemGroup>
 
 </Project>