build(deps): bump actions/checkout from 3 to 4 (#707)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  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>

.github/workflows/weekly-ci-bs-cmake-macos-xcode.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: 'Check out code'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with: { submodules: true }
       - { name: 'Config cmake Xcode',        run: 'cmake -S . -B build/xcode -G Xcode' }
       - { name: 'Build cmake Xcode default', run: 'cmake --build build/xcode' }