GHA: Update actions/checkout to v5

Author: lyrixx

.github/workflows/build-phar.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Build the PHAR
         uses: ./.github/actions/phar

.github/workflows/ci.yaml

@@ -13,7 +13,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: PHP-CS-Fixer
               uses: docker://oskarstark/php-cs-fixer-ga
@@ -25,7 +25,7 @@ jobs:
       runs-on: ubuntu-latest
       steps:
         - name: Checkout
-          uses: actions/checkout@v4
+          uses: actions/checkout@v5
 
         - name: PHPStan
           uses: docker://oskarstark/phpstan-ga
@@ -47,7 +47,7 @@ jobs:
                       name: "(prefer lowest dependencies)"
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP, with composer and extensions
               uses: shivammathur/setup-php@v2
@@ -83,7 +83,7 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v5
 
             - name: Setup PHP, with composer and extensions
               uses: shivammathur/setup-php@v2

.github/workflows/release.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Build the PHAR
         uses: ./.github/actions/phar