update workflow file to use java 17

Author: SteffenLm

.github/workflows/format.yml

@@ -12,4 +12,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'temurin'
       - uses: axel-op/googlejavaformat-action@v3