Update README.md

Author: gdeglin

README.md

@@ -4,4 +4,4 @@ OneSignal iOS Push Notification Plugin
 OneSignal is a free push notification service for mobile apps. This plugin makes it easy to integrate your native iOS app with OneSignal.
 
 - See http://documentation.onesignal.com/v2.0/docs/using-onesignal-in-your-ios-app for documentation.
-- See http://documentation.onesignal.com/v2.0/docs/ios-sdk-api for GameThrive API documentation.
+- See http://documentation.onesignal.com/v2.0/docs/ios-sdk-api for OneSignal API documentation.