CI: Avoid issues with special characters

Author: dschwoerer

.github/workflows/clang-format.yml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Run clang-format
         id: format
-        run: git clang-format origin/${{ github.base_ref }} || :
+        run: 'git clang-format origin/${{ github.base_ref }} || :'
 
       - name: Commit to the PR branch
         uses: stefanzweifel/git-auto-commit-action@v5