changed checkout to v4

Author: marcing

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
                     git config --global core.autocrlf input
                     git config --global core.eol lf
             -   name: Checkout
-                uses: actions/checkout@v2
+                uses: actions/checkout@v4
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
                 with:
@@ -50,7 +50,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v2
+                uses: actions/checkout@v4
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
                 with:
@@ -72,7 +72,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v2
+                uses: actions/checkout@v4
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
                 with: