Update JDK version from 17 to 21 in CodeQL workflow

Author: smklimenko

.github/workflows/codeql.yml

@@ -40,10 +40,10 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@main
 
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@main
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
         cache: 'gradle'