Use checkout action v6

Author: robtimus

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
   phpstan:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up PHP 7.4
@@ -50,7 +50,7 @@ jobs:
   phpcs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up PHP 7.4
@@ -87,7 +87,7 @@ jobs:
         php: [5.4, 5.6, 7.0, 7.4]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: shivammathur/setup-php@v2
@@ -116,7 +116,7 @@ jobs:
         php: [8.0, 8.1, 8.2, 8.3, 8.4]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
           fetch-depth: 0
@@ -162,7 +162,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: php8
           fetch-depth: 0

.github/workflows/dependency-review.yml

@@ -21,6 +21,6 @@ jobs:
   dependency-review:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v4

.github/workflows/release-site.yml

@@ -25,7 +25,7 @@ jobs:
   build-site:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up PHP
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: ['build-site']
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: true
       - uses: actions/download-artifact@v5

.github/workflows/sonarcloud.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     concurrency: sonar-${{ github.head_ref || github.ref_name }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Set up PHP 7.4