Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/php-cs-fixer.yml

@@ -8,7 +8,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v4
+                uses: actions/checkout@v5
 
             -   name: Fix style
                 uses: docker://oskarstark/php-cs-fixer-ga

.github/workflows/run-tests.yml

@@ -32,7 +32,7 @@ jobs:
               run: sudo apt-get update --fix-missing
 
             - name: Checkout code
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2

.github/workflows/update-changelog.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ github.event.release.target_commitish }}