switch to java 21

Author: stefanseifert

.github/workflows/maven-build.yml

@@ -26,6 +26,6 @@ jobs:
           os: ${{ matrix.os }}
           java-version: ${{ matrix.java }}
           sonar-run-on-os: ubuntu-latest
-          sonar-run-on-java-version: 17
+          sonar-run-on-java-version: 21
           sonar-token: ${{ secrets.SONAR_TOKEN }}
           github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/maven-deploy.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: 17
+          java-version: 21
           cache: maven
 
       - name: Build, verify, deploy, generate site