Bump the dotnet group (#43492)

Bumps the dotnet group in /docs/ai/how-to/snippets/semantic-kernel with 4 updates: [Microsoft.Extensions.Configuration](https://github.com/dotnet/runtime), [Microsoft.Extensions.Configuration.EnvironmentVariables](https://github.com/dotnet/runtime), [Microsoft.Extensions.Configuration.UserSecrets](https://github.com/dotnet/runtime) and [Microsoft.SemanticKernel](https://github.com/microsoft/semantic-kernel).


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.EnvironmentVariables` 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 8.0.1 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.1...v9.0.0)

Updates `Microsoft.SemanticKernel` from 1.27.0 to 1.28.0
- [Release notes](https://github.com/microsoft/semantic-kernel/releases)
- [Commits](microsoft/semantic-kernel@dotnet-1.27.0...dotnet-1.28.0)

---
updated-dependencies:
- 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.EnvironmentVariables
  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
- dependency-name: Microsoft.SemanticKernel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  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/ai/how-to/snippets/semantic-kernel/semantic-kernel.csproj

@@ -12,10 +12,10 @@
   <ItemGroup>
     <PackageReference Include="Azure.Extensions.AspNetCore.Configuration.Secrets" Version="1.3.2" />
     <PackageReference Include="Azure.Identity" Version="1.13.1" />
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="8.0.1" />
-    <PackageReference Include="Microsoft.SemanticKernel" Version="1.27.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.0" />
+    <PackageReference Include="Microsoft.SemanticKernel" Version="1.28.0" />
     <PackageReference Include="Microsoft.SemanticKernel.Connectors.AzureAISearch" Version="1.9.0-alpha" />
     <PackageReference Include="Microsoft.SemanticKernel.Connectors.Redis" Version="1.9.0-alpha" />
     <PackageReference Include="Microsoft.SemanticKernel.Plugins.Memory" Version="1.9.0-alpha" />