chore: update to actions/checkout@v4

Author: broofa

.github/workflows/browser.yml

@@ -15,7 +15,7 @@ jobs:
     timeout-minutes: 30
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 10
       - name: Use Node.js 20.x