docs(website): update docs

website/docs/extra-topics/mutative-ecosystem.md

@@ -13,3 +13,4 @@ The following are other libraries created based on Mutative:
 - [zustand-mutative](https://github.com/mutativejs/zustand-mutative) - A Mutative middleware for Zustand enhances the efficiency of immutable state updates.
 - [jotai-mutative](https://github.com/mutativejs/jotai-mutative) - A Mutative extension for Jotai.
 - [usm](https://github.com/unadlib/usm) - A universal state modular library, supports Redux(5.x), MobX(6.x), Vuex(4.x) and Angular(2.0+).
+- [xstate-mutative](https://github.com/mutativejs/xstate-mutative) - A faster and more flexible utilities for using Mutative with XState.