Merge pull request #159 from makotot/renovate/actions-checkout-2.x

chore(deps): update actions/checkout action to v2

Author: makotot

.github/workflows/size.yml

@@ -6,7 +6,7 @@ jobs:
     env:
       CI_JOB_NUMBER: 1
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - uses: andresz1/size-limit-action@v1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}