Update changelog

Author: thecrypticace

packages/@headlessui-vue/CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add `immediate` prop to `<Combobox />` for immediately opening the Combobox when the `input` receives focus ([#2686](https://github.com/tailwindlabs/headlessui/pull/2686))
 - Add `virtual` prop to `Combobox` component ([#2779](https://github.com/tailwindlabs/headlessui/pull/2779))
+- Allow users customize ID generation ([#2959](https://github.com/tailwindlabs/headlessui/pull/2959))
 
 ## [1.7.17] - 2024-01-08