chore(deps): update actions/stale action to v8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/stale	action	major	v7 -> v8

---

Release Notes

actions/stale

### [`v8`](https://togithub.com/actions/stale/compare/v7...v8) [Compare Source](https://togithub.com/actions/stale/compare/v7...v8)

---

Configuration

📅 Schedule: Branch creation - "before 3am every weekday" (UTC), 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 has been generated by Mend Renovate. View repository job log here.

[codecov[bot]]

Codecov Report

Merging #28 (a39d589) into main (ce0e048) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #28   +/-   ##
=======================================
  Coverage   86.69%   86.69%           
=======================================
  Files          12       12           
  Lines        1841     1841           
  Branches      218      218           
=======================================
  Hits         1596     1596           
  Misses        144      144           
  Partials      101      101