Allow Spotless to make commits on a user's behalf (#312)

See diffplug/spotless#1242

Author: JolandaVerhoef

.github/workflows/apply_spotless.yml

@@ -33,6 +33,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         token: ${{ secrets.PAT || github.token }}
+        fetch-depth: 0
 
     - name: set up Java 17
       uses: actions/setup-java@v4