Fix invalid YAML formatting in Dependabot workflow template

Signed-off-by: Mathias L. Baumann <mathias.baumann@frequenz.com>

Author: Marenz

cookiecutter/migrate.py

@@ -64,8 +64,7 @@ def create_dependabot_auto_merge_workflow() -> None:
     steps:
       - name: Auto-merge Dependabot PR
         uses: >-
-          frequenz-floss/dependabot-auto-approve@3cad5f42e79296505473325ac6636be897c8b8a1
-
+          frequenz-floss/dependabot-auto-approve@3cad5f42e79296505473325ac6636be897c8b8a1  # v1.3.2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           dependency-type: 'all'