Update README.md

Temporary update about CCGX

README.md

@@ -9,6 +9,8 @@ The following Victron dbus services are currently supported:
 - grid (com.victronenergy.grid._device_)
 - gps (com.victronenergy.gps._device_)
 
+_Please note: it is not recommended to install this driver on lower spec GX devices such as CCGX._
+
 ## [How To Say Thanks](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=R4Y63PPPD4CGG&source=url)
 If you find this driver useful and you want to say thanks, feel free to buy me a coffee using the "Thank You" link below.