update sentences

Author: Alice Pintus

library.properties

@@ -2,7 +2,7 @@ name=WiFi
 version=1.2.6
 author=Arduino
 maintainer=Arduino <[email protected]>
-sentence=Enables network connection (local and Internet) using the Arduino WiFi shield. For all Arduino boards.
+sentence=Enables network connection (local and Internet) using the Arduino WiFi shield.
 paragraph=With this library you can instantiate Servers, Clients and send/receive UDP packets through WiFi. The shield 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/WiFi