Add .NET setup to sonar workflow

Author: Tsingis

.github/workflows/sonar.yml

@@ -25,7 +25,11 @@ jobs:
   sonarcloud:
     runs-on: windows-latest
     steps:
-      - name: Set up JDK 17
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "9.0.x"
+      - name: Set up JDK
         uses: actions/setup-java@v4
         with:
           java-version: 17