cancel running CI jobs when a PR is updated (#1675)

@see nodejs/node#42017

Author: spaceninja

.github/workflows/ci.yml

@@ -7,6 +7,10 @@ on:
       - main
       - v-next
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   lint:
     runs-on: ubuntu-latest