workflow の同時実行を制限

Author: tatyam-prime

.github/workflows/verify.yml

@@ -6,6 +6,10 @@ on:
     - main
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   verify:
     runs-on: ubuntu-latest