Fix: Category field in library.properties accepts only 1 value

Author: giulcioffi

library.properties

@@ -4,7 +4,7 @@ author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=Library for Host boards that interact with BHY2 chip on Nicla Sense ME
 paragraph=Provides the APIs for a host board to interact with Nicla Sense ME board. The host board can be used to make a DFU or configure/read BHY sensors on the Nicla Sense ME via Eslov.
-category=Communication,Sensors
+category=Communication
 url=https://github.com/arduino-libraries/Arduino_BHY2Host
 architectures=samd,mbed
 includes=Arduino_BHY2Host.h