Bump the dotnet group with 1 update

Bumps Microsoft.Extensions.Telemetry.Abstractions from 9.7.0 to 9.9.0

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Telemetry.Abstractions
  dependency-version: 9.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

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

Author: dependabot[bot]

docs/core/diagnostics/snippets/MetricsGen/MetricsGen.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Telemetry.Abstractions" Version="9.7.0" />
+    <PackageReference Include="Microsoft.Extensions.Telemetry.Abstractions" Version="9.9.0" />
   </ItemGroup>
 
 </Project>