Add update tip for lots of dogs

I was running into an issue today where if I had more than ten dogs, the update command could only @ target the most recent dog number on the printout.

So, if I had twelve dogs, the tool would print out ten dogs, and then prompt to display the  last two dogs. An update ```ugc update @1 ...``` would target the last of the two dogs, not the first ten.

I'm hoping this tip will help others to target a specific dog when they have lots of them.