update changelog

Author: RobinMalfait

packages/@headlessui-react/CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ensure we handle `null` dataRef values correctly ([#2258](https://github.com/tailwindlabs/headlessui/pull/2258))
 - Move `aria-multiselectable` to `[role=listbox]` in the `Combobox` component ([#2271](https://github.com/tailwindlabs/headlessui/pull/2271))
 - Re-focus `Combobox.Input` when a `Combobox.Option` is selected ([#2272](https://github.com/tailwindlabs/headlessui/pull/2272))
+- Ensure `Dialog` starts cleaning up when the `Transition`'s `beforeLeave` fires ([#2264](https://github.com/tailwindlabs/headlessui/pull/2264))
 
 ## [1.7.10] - 2023-02-06