update Models.md

KenChoi · KenChoi · commit 36d872939a8c · 2018-01-17T13:52:30.000+08:00
diff --git a/document/Models.md b/document/Models.md
@@ -2,7 +2,7 @@
 
 - [UserInfo](#userinfo)
 - [GroupInfo](#groupinfo)
-- [ChatRoomInfo](#ChatRoomInfo)
+- [ChatRoomInfo](#chatroominfo)
 - [Conversation](#conversation)
 - [Message](#message)
   - [TextMessage](#textmessage)
