Update dependency decorator to v5 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
decorator	ironbank-pypi	major	4.4.2 -> 5.1.1
decorator		major	==4.4.2 -> ==5.1.1

⚠ Release Notes retrieval for this MR were skipped because no github.com credentials were available. If you are self-hosted, please see this instruction.

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

• If you want to rebase/retry this MR, click this checkbox.

---

This MR has been generated by Renovate Bot.