ci: use java 17 for validation action

Author: derklaro

.github/workflows/validate.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Setup java
         uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 17
           check-latest: true
           distribution: 'zulu'