Removes stray closing erb tag

I received this email:

>Dear Rails Girls Atlanta
>
>Pamela has joined your group!
>
>That means it's cake time! %> They are on twitter: @pwnela
>
>You can find out more about your latest member by heading over to your project group page.
>
>Best wishes from the RailsGirlsApp

So I did a quick delete of that pesky `%>`!