Update Java version in GitHub Actions workflow

Author: acffordyce973

.github/workflows/github-actions.yml

@@ -8,11 +8,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - name: Setup JAVA 11
+      - name: Setup JAVA 21
         uses: actions/setup-java@v5
         with:
-          distribution: 'corretto'
-          java-version: 11
+          distribution: 'temurin'
+          java-version: 21
 
       - name: Cache Gradle and wrapper
         uses: actions/cache@v4