fix 名称

sample/EasyWeChatClient/EasyWeChatClient/MainWindow.xaml.cs

@@ -36,7 +36,7 @@ namespace EasyWeChatClient
             CommonMethodCallBackHandlers.SendMsgCompleted += CommonMethodCallBackHandlers_SendMsgCompleted;
             new Task(() =>
             {
-                WeChat.InitWeiChatRobot();
+                WeChat.InitWeChatRobot();
             }).Start();
         }