Bump actions/checkout from 5.0.0 to 6.0.0 (#1206)

* Bump actions/checkout from 5.0.0 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](08c6903cd8...1af3b93b68)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andreas Gebhardt <agebhar1@googlemail.com>

.github/workflows/broken_links.yml

@@ -14,7 +14,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # ratchet:actions/checkout@v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # ratchet:actions/checkout@v6.0.0
 
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # ratchet:actions/setup-node@v6.0.0
         with: