fix(ci): skip doc push step on pull requests

Author: scottmckendry

.github/workflows/ci.yml

@@ -75,6 +75,7 @@ jobs:
                   treesitter: true
 
             - name: Push changes
+              if: github.ref == 'refs/heads/main' && github.event_name == 'push'
               uses: stefanzweifel/git-auto-commit-action@v5
               with:
                   commit_message: "docs: auto-generate vimdoc"