xcop.yml in cobench-0.0.37

- old
+ new

@@ -5,7 +5,7 @@
   pull_request:
 jobs:
   xcop:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: g4s8/xcop-action@master