update changelog

Author: RobinMalfait

packages/@headlessui-react/CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ensure `unmount` on `Dialog` works in combination with the `transition` prop on `DialogBackdrop` and `DialogPanel` components ([#3352](https://github.com/tailwindlabs/headlessui/pull/3352))
 - Fix crash in `Combobox` component when in `virtual` mode when options are empty ([#3356](https://github.com/tailwindlabs/headlessui/pull/3356))
 - Fix hanging tests when using `anchor` prop ([#3357](https://github.com/tailwindlabs/headlessui/pull/3357))
+- Fix `transition` and `focus` prop combination for `PopoverPanel` component ([#3361](https://github.com/tailwindlabs/headlessui/pull/3361))
 
 ## [2.1.1] - 2024-06-26