Update peter-evans/create-pull-request action to v4.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
peter-evans/create-pull-request	action	patch	v4.2.0 -> v4.2.1

---

Release Notes

peter-evans/create-pull-request

### [`v4.2.1`](https://togithub.com/peter-evans/create-pull-request/releases/tag/v4.2.1): Create Pull Request v4.2.1 [Compare Source](https://togithub.com/peter-evans/create-pull-request/compare/v4.2.0...v4.2.1) #### What's Changed - test: set default branch to main by [@​peter-evans](https://togithub.com/peter-evans) in [https://github.com/peter-evans/create-pull-request/pull/1310](https://togithub.com/peter-evans/create-pull-request/pull/1310) - fix: handle update after force pushing base to a new commit by [@​peter-evans](https://togithub.com/peter-evans) in [https://github.com/peter-evans/create-pull-request/pull/1307](https://togithub.com/peter-evans/create-pull-request/pull/1307) **Full Changelog**: https://github.com/peter-evans/create-pull-request/compare/v4.2.0...v4.2.1

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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.