Bump actions/checkout

Author: nbayramberdiyev

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
         name: PHP ${{ matrix.php-versions }}
         steps:
             - name: 📤 Checkout project
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
 
             - name: 🐘 Install PHP
               uses: shivammathur/setup-php@v2