Create concurrency.yml

.github/workflows/concurrency.yml

@@ -0,0 +1,17 @@
+name: concurrent workflow
+
+on: [workflow_dispatch]
+concurrency: 
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    defaults:
+      run:
+          shell: bash
+          working-directory: .
+    runs-on: ubuntu-latest  
+    steps:
+      - name: test
+        run: echo "${{ github.event }}"