Update JDK version from 17 to 21 in CI workflow

Author: reda-alaoui

.github/workflows/ci.yml

@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v2
         with:
-          java-version: '17'
-          distribution: 'adopt'
+          java-version: '21'
+          distribution: 'temurin'
       - name: Build with Maven
         uses: GabrielBB/xvfb-action@v1
         with: