Update size.yml

Author: wellyshen

.github/workflows/size.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: preactjs/compressed-size-action@v2
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"