add a workaround for mac

Author: Yuan Gong

README.md

@@ -46,7 +46,7 @@ pip install whisper-at
 ```
 
 For Mac users, there is a known bug, please use the following workaround:
-```
+```bash
 # install all dependencies except triton, this will break when it tries to install triton
 pip install whisper-at 
 # install whisper-at without any dependency