Bump actions/checkout from 4 to 5 (#74)

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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
           apt-get install -y g++ git jq
         env:
           DEBIAN_FRONTEND: noninteractive
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: "Declare git repo safe"
         # In the docker container the repo is owned by 1001:123, causing the
         # following error when running git commands: