Ignore thread/room bookkeeping events in the realtime stream

thread_created, thread_follow_changed, room_updated and
room_groups_updated are bookkeeping the dispatch ignores, but each one
logged as an unknown kind on occurrence. Adding them to the known list
quiets the stream; behavior is unchanged.

adapter.py

@@ -1485,6 +1485,10 @@ class ChattoAdapter(BasePlatformAdapter):
             "message_retracted",
             "user_joined_room",
             "user_left_room",
+            "thread_created",
+            "thread_follow_changed",
+            "room_updated",
+            "room_groups_updated",
         ):
             logger.debug(
                 "Chatto: '%s' event received. Not yet implemented or not needed.",