Use GitHub actions concurrency to cancel in progress workflows on PRs (…

…vercel#1232)

.github/workflows/test.yml

@@ -1,13 +1,16 @@
 name: test
 on: pull_request
+
+# Cancel in progress workflows on pull_requests.
+# https://docs.github.com/en/actions/using-jobs/using-concurrency#example-using-a-fallback-value
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Cancel running workflows
-        uses: styfle/cancel-workflow-action@0.12.0
-        with:
-          access_token: ${{ github.token }}
       - name: Checkout repo
         uses: actions/checkout@v4
       - name: Set node version