xcop.yml in mergem-0.0.3

- old
+ new

@@ -3,9 +3,9 @@
 on:
   push:
   pull_request:
 jobs:
   xcop:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: g4s8/xcop-action@master