chore(deps): bump actions/checkout from 1 to 6 in the actions group

Bumps the actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 1 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v6)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -778,7 +778,7 @@ jobs:
     timeout-minutes: 90
 
     steps:
-    - uses: actions/checkout@v1  # v1 is required to run inside docker
+    - uses: actions/checkout@v6  # v1 is required to run inside docker
 
     - name: Install requirements
       run: |