chore: bump actions/checkout from 3 to 5 (#16)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
                 php-versions: ["7.2"]
         runs-on: ${{ matrix.operating-system }}
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v5
 
             - name: Setup PHP, with composer and extensions
               uses: shivammathur/setup-php@v2
@@ -55,7 +55,7 @@ jobs:
 
         runs-on: ${{ matrix.operating-system }}
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v5
 
             - name: Setup PHP, with composer and extensions
               uses: shivammathur/setup-php@v2