Update balena-os/leviathan-worker to v2.9.21

[balena-renovate[bot]]

This PR contains the following updates:

Package	Update	Change
balena-os/leviathan-worker	patch	2.9.20 -> 2.9.21

---

Release Notes

balena-os/leviathan-worker (balena-os/leviathan-worker)

### [`v2.9.21`](https://togithub.com/balena-os/leviathan-worker/blob/HEAD/CHANGELOG.md#v2921) [Compare Source](https://togithub.com/balena-os/leviathan-worker/compare/v2.9.20...v2.9.21) #### (2023-08-30) - add lib dependencies \[rcooke-warwick] - enable alternative sd mux \[rcooke-warwick]

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ 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 Renovate Bot.