[.github/workflows] Update peter-evans/create-pull-request action to v6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
peter-evans/create-pull-request	action	major	v5 -> v6

---

Release Notes

peter-evans/create-pull-request (peter-evans/create-pull-request)

### [`v6`](https://togithub.com/peter-evans/create-pull-request/compare/v5...v6) [Compare Source](https://togithub.com/peter-evans/create-pull-request/compare/v5...v6)

---

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 has been generated by Mend Renovate. View repository job log here.