fix github action

Author: imakira

.github/workflows/docs.yml

@@ -15,6 +15,7 @@ jobs:
         run: |
           git config --local user.email "github-actions[bot]@users.noreply.github.com"
           git config --local user.name "github-actions[bot]"
+          git add ./
           git commit -a -m "automatically generate api docs"
       - name: Push changes
         uses: ad-m/github-push-action@master