Fix PR creation by specifying the branch on release

.github/workflows/ci.yml

@@ -393,5 +393,8 @@ jobs:
           git add sig
           git config user.name 'github-actions[bot]'
           git config user.email 'github-actions[bot]@users.noreply.github.com'
-          git commit -m "Update signatures of ${TAG_NAME#jq-}"
-          gh pr create --title "Update signatures of ${TAG_NAME#jq-}" --body ""
+          title="Update signatures of ${TAG_NAME#jq-}"
+          git commit -m "$title"
+          branch="update-signatures-${TAG_NAME#jq-}"
+          git push origin "HEAD:$branch"
+          gh pr create --title "$title" --body "" --head "$branch"