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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-container.yml

@@ -23,7 +23,7 @@ jobs:
           app-id: ${{ secrets.APP_ID }}
           private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: metacpan
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           token: ${{ steps.app-token.outputs.token }}
       - uses: metacpan/metacpan-actions/docker-build-push@master

.github/workflows/code-formatting.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
     name: Code Formatting
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Fetch base ref

.github/workflows/update-snapshot.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: haarg/setup-git-user@v1
         with:
           app: ${{ steps.app-token.output.app-slug }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           token: ${{ steps.app-token.outputs.token }}
       - name: Update cpanfile.snapshot