Update size.yml

Author: wellyshen

.github/workflows/size.yml

@@ -8,6 +8,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - uses: preactjs/compressed-size-action@2.1.0
+      - uses: preactjs/compressed-size-action@v2
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"