Update README.md

Author: kkoyung

README.md

@@ -93,7 +93,7 @@ The controllers can connect to your Linux machine via Bluetooth, just like usual
     python -m joymote
     ```
 
-## Pairing two Joy-Con as one device
+## Pairing two Joy-Con as one device (Optional)
 
 Use [joycond](https://github.com/DanielOgorchock/joycond), which is a userspace daemon, to combine Joy-Cons into a single device.