github-actions(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/integrate.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: "Set up PHP"
         uses: "shivammathur/setup-php@v2"
@@ -66,7 +66,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: "Set up PHP"
         uses: "shivammathur/setup-php@v2"
@@ -122,7 +122,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: "Set up PHP"
         uses: "shivammathur/setup-php@v2"

.github/workflows/pr-preview.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: "ubuntu-22.04"
     if: "github.repository_owner == 'php' && github.event.label.name == 'Status: Preview Allowed'"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: "refs/pull/${{ github.event.number }}/merge"
 
@@ -53,7 +53,7 @@ jobs:
       HTTP_HOST: "localhost:8080"
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: "refs/pull/${{ github.event.number }}/merge"
 

.github/workflows/update-screenshots.yaml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: "Set up PHP"
         uses: "shivammathur/setup-php@v2"