Add mbed_nicla to supported platforms

Author: pennam

library.properties

@@ -6,5 +6,5 @@ sentence=Firmware update for the Portenta H7.
 paragraph=This library allows performing a firmware update on the Arduino Portenta H7. The firmware can be stored in various different locations such as within the microcontroller's flash, on an external SD card or on the QSPI flash chip.
 category=Communication
 url=https://github.com/arduino-libraries/Arduino_Portenta_OTA
-architectures=mbed,mbed_portenta
+architectures=mbed,mbed_portenta,mbed_nicla
 includes=Arduino_Portenta_OTA.h