Update README.md

Author: drhelius

README.md

@@ -8,7 +8,7 @@
 [![License](https://img.shields.io/github/license/drhelius/Geargrafx)](https://github.com/drhelius/Geargrafx/blob/main/LICENSE)
 [![Twitter Follow](https://img.shields.io/twitter/follow/drhelius)](https://x.com/drhelius)
 
-Geargrafx is an accurate cross-platform TurboGrafx-16 / PC Engine emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch.
+Geargrafx is an accurate cross-platform TurboGrafx-16 / PC Engine / SuperGrafx emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch.
 
 This is an open source project with its ongoing development made possible thanks to the support by these awesome [backers](backers.md). If you find it useful, please consider [sponsoring](https://github.com/sponsors/drhelius).