Update README.md: Fixed typo

Fixed typo (descendent → descendant)

README.md

@@ -3,7 +3,7 @@
 [![License: ISC](https://img.shields.io/badge/License-ISC-blue.svg)](https://github.com/higan-emu/ares/blob/master/LICENSE)
 
 **ares** is a multi-system emulator that began development on October 14th, 2004.
-It is a descendent of [higan](https://github.com/higan-emu/higan) and [bsnes](https://github.com/bsnes-emu/bsnes/), and focuses on accuracy and preservation.
+It is a descendant of [higan](https://github.com/higan-emu/higan) and [bsnes](https://github.com/bsnes-emu/bsnes/), and focuses on accuracy and preservation.
 
 Official Releases
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