chore(deps): update pnpm/action-setup action to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
pnpm/action-setup	action	major	v2.4.0 -> v3.0.0

---

Release Notes

pnpm/action-setup (pnpm/action-setup)

### [`v3.0.0`](https://togithub.com/pnpm/action-setup/releases/tag/v3.0.0) [Compare Source](https://togithub.com/pnpm/action-setup/compare/v2.4.0...v3.0.0) The action is updated to run on Node.js v20

---

Configuration

📅 Schedule: Branch creation - "before 4am on Monday" (UTC), 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 has been generated by Mend Renovate. View repository job log here.