Outdated repo description

The description of the repo still only mentions NativeUI, while it was replaced with MenuAPI [in 2018](https://github.com/TomGrobbe/vMenu/releases/tag/v2.1.0).

<img width="330" height="179" alt="Image" src="https://github.com/user-attachments/assets/a48a676d-4c35-477f-b901-17c8c9897aca" />