Bump actions/checkout from 5.0.1 to 6.0.0 (#77)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@93cb6ef...1af3b93)

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

Author: dependabot[bot]

.github/workflows/branch-protection.yaml

@@ -21,7 +21,7 @@ jobs:
           - 3.4.4
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
       - uses: ruby/setup-ruby@8aeb6ff8030dd539317f8e1769a044873b56ea71
         with:
           ruby-version: ${{ matrix.ruby }}

.github/workflows/continuous-delivery.yaml

@@ -23,7 +23,7 @@ jobs:
           - ubuntu-24.04-arm
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
       - uses: ruby/setup-ruby@8aeb6ff8030dd539317f8e1769a044873b56ea71
         with:
           ruby-version: 3.4.4