cache v4

Author: asika32764

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
         php-versions: [ '8.2', '8.3', '8.4' ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       # PHP
       - name: Setup PHP
         uses: shivammathur/setup-php@v2