CI: try use quote to skip ..

.github/workflows/main.yml

@@ -33,7 +33,7 @@ jobs:
         run: |
           # exit with error if any dot files have been changed
           # this is to avoid security issues with public modifications to github workflow files
-          git diff ${{ github.sha }} --exit-code -- .*
+          git diff ${{ github.sha }} --exit-code -- ".*"
       - name: Push
         if: github.ref == 'refs/heads/master'
         run: |