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

[renovate]

This PR contains the following updates:

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

---

Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Bump the minor-npm-dependencies group across 1 directory with 4 updates by @​dependabot in https://github.com/actions/checkout/pull/1739
• Bump actions/checkout from 3 to 4 by @​dependabot in https://github.com/actions/checkout/pull/1697
• Check out other refs/* by commit by @​orhantoy in https://github.com/actions/checkout/pull/1774
• Pin actions/checkout's own workflows to a known, good, stable version. by @​jww3 in https://github.com/actions/checkout/pull/1776

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), 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

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.97%. Comparing base (3061a5b) to head (c20cf96).
Report is 27 commits behind head on main.

❗ Current head c20cf96 differs from pull request most recent head 3e8c98d

Please upload reports for the commit 3e8c98d to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #129   +/-   ##
=======================================
  Coverage   93.97%   93.97%           
=======================================
  Files           3        3           
  Lines         166      166           
  Branches       42       42           
=======================================
  Hits          156      156           
  Misses          7        7           
  Partials        3        3           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.