Update actions/checkout action to v4.2.1

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	patch	`v4.2.0` -> `v4.2.1`

Release Notes

actions/checkout (actions/checkout)

### [`v4.2.1`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v421) [Compare Source](https://redirect.github.com/actions/checkout/compare/v4.2.0...v4.2.1) - Check out other refs/\* by commit if provided, fall back to ref by [@orhantoy](https://redirect.github.com/orhantoy) in [https://github.com/actions/checkout/pull/1924](https://redirect.github.com/actions/checkout/pull/1924)

Configuration

📅 Schedule: Branch creation - "after 0:00 and before 23:00" in timezone Asia/Tokyo, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

[ ] If you want to rebase/retry this PR, check this box

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hytsnbr / shiny-colors-cd-info-collector

Update actions/checkout action to v4.2.1 #384

Release Notes

Configuration

Quality Gate passed