Update dependency release-it to v15.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
release-it	15.8.0 -> 15.9.0

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Release Notes

release-it/release-it

### [`v15.9.0`](https://togithub.com/release-it/release-it/releases/tag/15.9.0) [Compare Source](https://togithub.com/release-it/release-it/compare/15.8.0...15.9.0) - Update dependencies ([`2271e2a`](https://togithub.com/release-it/release-it/commit/2271e2a)) - Remove unnecessary `await` ([`b34a9d5`](https://togithub.com/release-it/release-it/commit/b34a9d5)) - Support function for configuring github/gitlab releaseNotes ([#​987](https://togithub.com/release-it/release-it/issues/987)) ([`81e18fa`](https://togithub.com/release-it/release-it/commit/81e18fa))

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Configuration

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

🚦 Automerge: Enabled.

♻ 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.

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

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