change jave version within ci-pipeline

Author: danielfeismann

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
 
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4