Bump Microsoft.Extensions.AI.Abstractions from 10.5.0 to 10.6.0

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.AI.Abstractions
  dependency-version: 10.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: extensionsai
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/xAI/xAI.csproj

@@ -18,7 +18,7 @@
     <PackageReference Include="NuGetizer" Version="1.4.7" PrivateAssets="all" />
     <PackageReference Include="Google.Protobuf" Version="3.34.1" />
     <PackageReference Include="Grpc.Net.Client" Version="2.76.0" />
-    <PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="10.5.0" />
+    <PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="10.6.0" />
     <PackageReference Include="System.ClientModel" Version="1.10.0" />
   </ItemGroup>