Fixed url in library.properties (#22)

Author: njh

library.properties

@@ -5,6 +5,6 @@ maintainer=Arduino <info@arduino.cc>
 sentence=Arduino Library for Arduino Portenta Breakout Carrier
 paragraph=
 category=Other
-url=https://github.com/arduino-libraries/Arduino_PortentaBreakoutCarrier
+url=https://github.com/arduino-libraries/Arduino_PortentaBreakoutLibrary
 architectures=mbed,mbed_portenta
 includes=Arduino_PortentaBreakoutCarrier.h