Configured stalebot to run at 15:00 UTC
Configured stalebot to run at 15:00 UTC

refs https://github.com/TryGhost/Toolbox/issues/81

- changes the bot to run during office hours so we can keep an eye on it

e10/Ghost,TryGhost/Ghost,ErisDS/Ghost,e10/Ghost,ErisDS/Ghost,TryGhost/Ghost,TryGhost/Ghost,ErisDS/Ghost