fix(ci): pinactのpushコマンドを修正

detached HEAD状態でも正しくpushできるように修正

Author: nkoji21

.github/workflows/ci.yaml

@@ -79,4 +79,4 @@ jobs:
 
           git add .github/workflows/
           git commit -m "chore(ci): pin GitHub Actions to commit SHA"
-          git push
+          git push origin HEAD:${{ github.head_ref || github.ref_name }}