is it new? 

in learn more we can find

wget -q -O /dev/null http://www.yoursite.com/ow_cron/run.php
 or 
lynx http://www.yoursite.com/ow_cron/run.php
 or simply 
curl http://www.yoursite.com/ow_cron/run.php

but in my hosts command is

 cronurl 'http://www.yoursite.com/ow_cron/run.php' ;

in logs I can see that cron job is running every minute

why I'm getting this notice  You still need to setup the cron job