[CI] Add C# 9 through 13 to the build matrix.

Author: vyazelenko

.github/workflows/ci.yml

@@ -85,7 +85,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        dotnet: [ '8.0.x' ]
+        dotnet: [ '8.0.x', '9.0.x', '10.0.x', '11.0.x', '12.0.x', '13.0.x' ]
     env:
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
       DOTNET_CLI_TELEMETRY_OPTOUT: 1