chore(deps): update dependency @antora/cli to v3.1.9

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@antora/cli (source)	3.1.7 -> 3.1.9

---

Release Notes

antora/antora (@​antora/cli)

### [`v3.1.9`](https://gitlab.com/antora/antora/compare/v3.1.8...v3.1.9) [Compare Source](https://gitlab.com/antora/antora/compare/v3.1.8...v3.1.9) ### [`v3.1.8`](https://gitlab.com/antora/antora/compare/v3.1.7...v3.1.8) [Compare Source](https://gitlab.com/antora/antora/compare/v3.1.7...v3.1.8)

---

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 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 was generated by Mend Renovate. View the repository job log.