update java version sonar job

Author: R-Sandor

.github/workflows/sonar.yml

@@ -18,10 +18,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21 
           distribution: "temurin"
       - name: Cache SonarQube packages
         uses: actions/cache@v4