ci(prettier): Include git diff in Prettier workflow output (DenverCoder1#558)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: DenverCoder1

.github/workflows/prettier.yml

@@ -35,7 +35,9 @@ jobs:
         run: composer lint
 
       - name: Prettify code
-        run: composer lint-fix
+        run: |
+          composer lint-fix
+          git diff
 
       - name: Commit changes
         uses: EndBug/add-and-commit@v9