.github/workflows/sonar.yml: Upgraded JDK to 21 (latest LTS) because …

…SonarCloud no longer supports JDK 11. Fixes #883.

.github/workflows/sonar.yml

@@ -1,4 +1,4 @@
-# Licensed to the Apache Software Foundation (ASF) under one
+# Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
@@ -38,11 +38,11 @@ jobs:
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: '7.0.x'
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
-          java-version: 11
+          java-version: '21'
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis