Update klutchell/unbound Docker tag to v1.22.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
klutchell/unbound	final	minor	1.21.1 -> 1.22.0

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Release Notes

klutchell/unbound-docker (klutchell/unbound)

### [`v1.22.0`](https://redirect.github.com/klutchell/unbound-docker/compare/v1.22.0...v1.22.0) [Compare Source](https://redirect.github.com/klutchell/unbound-docker/compare/v1.22.0...v1.22.0) ### [`v1.22.0`](https://redirect.github.com/klutchell/unbound-docker/compare/v1.21.1...v1.22.0) [Compare Source](https://redirect.github.com/klutchell/unbound-docker/compare/v1.21.1...v1.22.0)

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Configuration

📅 Schedule: Branch creation - "before 4am on Monday" in timezone America/New_York, 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.

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• [ ] If you want to rebase/retry this PR, check this box

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