Bump the dotnet group with 2 updates

Bumps Microsoft.Extensions.AI from 9.8.0 to 9.9.0
Bumps System.Threading.RateLimiting from 10.0.0-preview.7.25380.108 to 10.0.0-rc.1.25451.107

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.AI
  dependency-version: 9.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: System.Threading.RateLimiting
  dependency-version: 10.0.0-rc.1.25451.107
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

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

Author: dependabot[bot]

docs/ai/snippets/microsoft-extensions-ai/AI.Shared/AI.Shared.csproj

@@ -7,8 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.AI" Version="9.8.0" />
-    <PackageReference Include="System.Threading.RateLimiting" Version="10.0.0-preview.7.25380.108" />
+    <PackageReference Include="Microsoft.Extensions.AI" Version="9.9.0" />
+    <PackageReference Include="System.Threading.RateLimiting" Version="10.0.0-rc.1.25451.107" />
   </ItemGroup>
 
 </Project>