Upgrade checkout action to v4

Author: augusto-herrmann

.github/workflows/frictionless.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Validate data
         uses: frictionlessdata/frictionless-ci@v2
         with: