chore(deps): 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

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

---

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 becomes conflicted, 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.

[findersky]

这是自动回信息！       您好！首先感谢你的来信！如果不出意外最短在一个月内会得到我的回复，如果没有我的回复，说明我还需要更多的时间！

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (529b37f) 99.54% compared to head (9cd9697) 99.54%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #168   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files          23       23           
  Lines        1107     1107           
  Branches      169      169           
=======================================
  Hits         1102     1102           
  Misses          5        5           

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