chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/CI.yml

@@ -20,7 +20,7 @@ jobs:
         pnpm:
           - 8
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Cache
         uses: actions/cache@v3