chore(deps): update actions/checkout action to v4

[doctolib-renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4
actions/checkout	action	major	v3.0.1 -> v4.2.2

---

Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• url-helper.ts now leverages well-known environment variables by @​jww3 in https://github.com/actions/checkout/pull/1941
• Expand unit test coverage for isGhes by @​jww3 in https://github.com/actions/checkout/pull/1946

---

Configuration

📅 Schedule: Branch creation - Only on Sunday and Saturday ( * * * * 0,6 ) in timezone Europe/Paris, 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 these updates again.

---

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

---

This PR was created by Renovate.

Details

Check the default configuration and documentation.

See the logs on Datadog.
To replay this update, you can use the following packageRules on the Manual Run page: [{"matchPackageNames": ["*"], "enabled": false}, {"matchPackageNames": ["actions/checkout"], "enabled": true}]