chore(deps): update docker.io/rancher/system-upgrade-controller docker tag to v0.14.2

This MR contains the following updates:

Package	Update	Change
docker.io/rancher/system-upgrade-controller	minor	v0.13.4 -> v0.14.2

---

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 MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about this update again.

---

• If you want to rebase/retry this MR, check this box

---

This MR has been generated by Renovate Bot. The local configuration can be found in the SI Renovate Bot repository.