Doc: clarifies that we supports illumos only

Author: CarterLi

README.md

@@ -13,7 +13,7 @@
 [![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/fastfetch-cli/fastfetch)
 [![中文README](https://img.shields.io/badge/%E4%B8%AD%E6%96%87-README-red)](README-cn.md)
 
-Fastfetch is a [neofetch](https://github.com/dylanaraps/neofetch)-like tool for fetching system information and displaying it in a visually appealing way. It is written mainly in C, with a focus on performance and customizability. Currently, it supports Linux, macOS, Windows 7+, Android, FreeBSD, OpenBSD, NetBSD, DragonFly, Haiku, and SunOS.
+Fastfetch is a [neofetch](https://github.com/dylanaraps/neofetch)-like tool for fetching system information and displaying it in a visually appealing way. It is written mainly in C, with a focus on performance and customizability. Currently, it supports Linux, macOS, Windows 7+, Android, FreeBSD, OpenBSD, NetBSD, DragonFly, Haiku, and illumos (SunOS).
 
 <img src="screenshots/example1.png" width="49%" align="left" />
 <img src="https://upload.wikimedia.org/wikipedia/commons/2/24/Transparent_Square_Tiles_Texture.png" width="49%" height="16px" align="left" />