fix(deps): update dependency preact to v10.21.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
preact (source)	10.20.2 -> 10.21.0

---

Release Notes

preactjs/preact (preact)

### [`v10.21.0`](https://togithub.com/preactjs/preact/releases/tag/10.21.0) [Compare Source](https://togithub.com/preactjs/preact/compare/10.20.2...10.21.0) #### Features - Debug throw on too many rerenders ([#​4349](https://togithub.com/preactjs/preact/issues/4349), thanks [@​rschristian](https://togithub.com/rschristian)) - Add compat/client types ([#​4345](https://togithub.com/preactjs/preact/issues/4345), thanks [@​rschristian](https://togithub.com/rschristian)) #### Fixes - Expose hooks through compat's `ReactCurrentDispatcher` ([#​4342](https://togithub.com/preactjs/preact/issues/4342), thanks [@​rschristian](https://togithub.com/rschristian)) - Respect default value ([#​4341](https://togithub.com/preactjs/preact/issues/4341), thanks [@​JoviDeCroock](https://togithub.com/JoviDeCroock)) - Incorrect "missing transform-jsx-source" warning ([#​4350](https://togithub.com/preactjs/preact/issues/4350), thanks [@​rschristian](https://togithub.com/rschristian)) #### Types - Support ComponentChild(ren) in compat render/hydrate/createPortal ([#​4346](https://togithub.com/preactjs/preact/issues/4346), thanks [@​rschristian](https://togithub.com/rschristian)) - Import and re-export PreactElement ([#​3228](https://togithub.com/preactjs/preact/issues/3228), thanks [@​henryqdineen](https://togithub.com/henryqdineen)) #### Maintenance - Add zustand and redux-toolkit to the demo. ([#​3523](https://togithub.com/preactjs/preact/issues/3523), thanks [@​MortezaMirjavadi](https://togithub.com/MortezaMirjavadi)) - Optimise jsx runtime ([#​4337](https://togithub.com/preactjs/preact/issues/4337), thanks [@​JoviDeCroock](https://togithub.com/JoviDeCroock))

---

Configuration

📅 Schedule: Branch creation - "on the 12th day of the month" (UTC), 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 has been generated by Mend Renovate. View repository job log here.