Fix bad merge causing unread update issue (#4966)

api/channel.go

@@ -1297,6 +1297,7 @@ func viewChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_CHANNEL_VIEWED, c.TeamId, "", c.Session.UserId, nil)
 	message.Add("channel_id", view.ChannelId)
+	go Publish(message)
 
 	ReturnStatusOK(w)
 }