Fix autoblack

.github/workflows/autoblack.yml

@@ -29,4 +29,4 @@ jobs:
           git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
           git checkout $GITHUB_HEAD_REF
           git commit -am "fixup: Format Python code with Black"
-          git push
+          git push origin HEAD:master