try git fetch origin main to only fetch main branch

.github/workflows/docs.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Check if package.json was modified
         id: pub
         run: |
-          git fetch --deepen=1 && git checkout main
+          git fetch origin main && git checkout main
           if git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep -q "lib/package.json"; then
             echo "file_changed=true" >> $GITHUB_ENV
           else