Add missing rp2040 architecture to library.properties

Author: pennam

Diff for: library.properties

@@ -6,5 +6,5 @@ sentence=Arduino Library for network connection management (WiFi, GSM, NB, [Ethe
 paragraph=Originally part of ArduinoIoTCloud
 category=Communication
 url=https://github.com/arduino-libraries/Arduino_ConnectionHandler
-architectures=samd,esp32,esp8266,mbed,megaavr,mbed_nano,mbed_portenta,mbed_nicla,mbed_opta,mbed_giga,renesas_portenta,renesas_uno,mbed_edge,stm32
+architectures=samd,esp32,esp8266,mbed,megaavr,mbed_nano,mbed_portenta,mbed_nicla,mbed_opta,mbed_giga,renesas_portenta,renesas_uno,mbed_edge,stm32,rp2040
 depends=Arduino_DebugUtils, WiFi101, WiFiNINA, MKRGSM, MKRNB, MKRWAN, Blues Wireless Notecard (>=1.6.3)