update workflow to verify format

Author: jonathanlukas

.github/workflows/mvn-build.yml

@@ -20,4 +20,4 @@ jobs:
           java-version: '21'
           distribution: 'adopt'
       - name: Build with Maven
-        run: mvn --batch-mode --update-snapshots package
+        run: mvn verify -PcheckFormat -B