deps: bump System.CodeDom from 8.0.0 to 9.0.0 in /telemetry/csharp

Bumps [System.CodeDom](https://github.com/dotnet/runtime) 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)

---
updated-dependencies:
- dependency-name: System.CodeDom
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

telemetry/csharp/AwsToolkit.Telemetry.Events.Generator.Core/AwsToolkit.Telemetry.Events.Generator.Core.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="System.CodeDom" Version="8.0.0" />
+    <PackageReference Include="System.CodeDom" Version="9.0.0" />
   </ItemGroup>
 
 </Project>