batch changes - update checkout v2 to v3

Author: Sourcegraph

.github/workflows/scip.yml

@@ -5,7 +5,7 @@ jobs:
   index:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Setup Node.js
         uses: actions/setup-node@v2
         with: