Update actions/checkout action to v4.2.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	minor	v4.1.7 -> v4.2.1

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Release Notes

actions/checkout (actions/checkout)

v4.2.1

Compare Source

• Check out other refs/* by commit if provided, fall back to ref by @​orhantoy in https://github.com/actions/checkout/pull/1924

v4.2.0

Compare Source

• Add Ref and Commit outputs by @​lucacome in https://github.com/actions/checkout/pull/1180
• Dependency updates by @​dependabot- https://github.com/actions/checkout/pull/1777, https://github.com/actions/checkout/pull/1872

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Configuration

📅 Schedule: Branch creation - "after 11pm every weekday,before 7am every weekday,every weekend" in timezone Europe/Brussels, Automerge - At any time (no schedule defined).

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

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

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

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