chore: bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/update-repository.yml

@@ -38,7 +38,7 @@ jobs:
     runs-on: ubuntu-latest
     if: needs.check-label.outputs.has_valid_label == 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
           token: ${{ secrets.APP_INSTALLATION_TOKEN }}
@@ -127,7 +127,7 @@ jobs:
     if: needs.check-label.outputs.has_valid_label == 'true'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: main
           # Ensure we get the latest code including changes from previous job

.github/workflows/validate.yml

@@ -15,7 +15,7 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0