chore(deps): update dependency knip to v6.23.0 (#1041)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Adoption](https://docs.renovatebot.com/merge-confidence/) |
[Passing](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|---|---|
| [knip](https://knip.dev)
([source](https://redirect.github.com/webpro-nl/knip/tree/HEAD/packages/knip))
| [`6.22.0` →
`6.23.0`](https://renovatebot.com/diffs/npm/knip/6.22.0/6.23.0) |
![age](https://developer.mend.io/api/mc/badges/age/npm/knip/6.23.0?slim=true)
|
![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/knip/6.23.0?slim=true)
|
![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/knip/6.22.0/6.23.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/knip/6.22.0/6.23.0?slim=true)
|

---

### Release Notes

<details>
<summary>webpro-nl/knip (knip)</summary>

###
[`v6.23.0`](https://redirect.github.com/webpro-nl/knip/releases/tag/knip%406.23.0):
Release 6.23.0

[Compare
Source](https://redirect.github.com/webpro-nl/knip/compare/knip@6.22.0...knip@6.23.0)

- feat: add customCss to Starlight plugin
([#&#8203;1828](https://redirect.github.com/webpro-nl/knip/issues/1828))
([`f85d96f`](https://redirect.github.com/webpro-nl/knip/commit/f85d96f84a47f10c34df95a5246ee1ddefd95db5))
- thanks
[@&#8203;trueberryless](https://redirect.github.com/trueberryless)!
- fix: enable vite and vitest plugins when vite-plus is found
([#&#8203;1830](https://redirect.github.com/webpro-nl/knip/issues/1830))
([`62e9753`](https://redirect.github.com/webpro-nl/knip/commit/62e97538fca8dff3d152326b114ffc4b7241a0d2))
- thanks [@&#8203;ghostdevv](https://redirect.github.com/ghostdevv)!
- feat: add support for
[@&#8203;astrojs/markdoc](https://redirect.github.com/astrojs/markdoc)
([#&#8203;1829](https://redirect.github.com/webpro-nl/knip/issues/1829))
([`94e2863`](https://redirect.github.com/webpro-nl/knip/commit/94e2863308947f19f5e759cc12666952c8f683d7))
- thanks
[@&#8203;trueberryless](https://redirect.github.com/trueberryless)!
- Support nub (resolve
[#&#8203;1831](https://redirect.github.com/webpro-nl/knip/issues/1831))
([`8a6050e`](https://redirect.github.com/webpro-nl/knip/commit/8a6050e6a92da81d4875f730f852fb7d9252a018))
- Don't report optimizeDeps and dedupe deps as unlisted (resolve
[#&#8203;1832](https://redirect.github.com/webpro-nl/knip/issues/1832))
([`849b5ac`](https://redirect.github.com/webpro-nl/knip/commit/849b5ac230e7a8c103b6e1b1e2ddb333d2da3ca0))

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- 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.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/JoshuaKGoldberg/ts-api-utils).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNDIuMiIsInVwZGF0ZWRJblZlciI6IjQzLjI0Mi4yIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]