Update README.md

Author: devinroth

README.md

@@ -27,7 +27,7 @@ Sponsor: https://github.com/sponsors/ExistentialAudio
 - Customizable to 256+ channels if you think your computer can handle it.
 - Supports 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz sample rates.
 - No additional driver latency. 
-- Works on macOS 10.10+ including macOS 10.15 Catalina
+- Works on macOS 10.10+ including macOS Big Sur
 
 ![Image of BlackHole Audio Driver](Images/BlackHole.png)