Add Nano33IoT to explicit targets list

Author: facchinm

library.properties

@@ -2,7 +2,7 @@ name=WiFiNINA
 version=1.4.0
 author=Arduino
 maintainer=Arduino <[email protected]>
-sentence=Enables network connection (local and Internet) with the Arduino MKR WiFi 1010, Arduino MKR VIDOR 4000 and Arduino UNO WiFi Rev.2.
+sentence=Enables network connection (local and Internet) with the Arduino MKR WiFi 1010, Arduino MKR VIDOR 4000, Arduino UNO WiFi Rev.2 and Nano 33 IoT.
 paragraph=With this library you can instantiate Servers, Clients and send/receive UDP packets through WiFi. The board can connect either to open or encrypted networks (WEP, WPA). The IP address can be assigned statically or through a DHCP. The library can also manage DNS.
 category=Communication
 url=http://www.arduino.cc/en/Reference/WiFiNINA