Bump Roslynator.CodeAnalysis.Analyzers from 4.12.4 to 4.12.6 in /webapi

Bumps [Roslynator.CodeAnalysis.Analyzers](https://github.com/dotnet/roslynator) from 4.12.4 to 4.12.6.
- [Release notes](https://github.com/dotnet/roslynator/releases)
- [Changelog](https://github.com/dotnet/roslynator/blob/main/ChangeLog.md)
- [Commits](dotnet/roslynator@v4.12.4...v4.12.6)

---
updated-dependencies:
- dependency-name: Roslynator.CodeAnalysis.Analyzers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

webapi/CopilotChatWebApi.csproj

@@ -61,7 +61,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
 
-    <PackageReference Include="Roslynator.CodeAnalysis.Analyzers" Version="4.12.4">
+    <PackageReference Include="Roslynator.CodeAnalysis.Analyzers" Version="4.12.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>