Updated README to have the right config example.
Updated README to have the right config example.

git-svn-id: a1b6e0d49bc4387fe4a4e65e8a2b8bec69f11560@300 7bbfaf0e-4d1d-0410-9690-a8bb5f8ef2aa

kakra/hoptoad_notifier,airbrake/airbrake,Shopify/airbrake,nick-desteffen/airbrake,airbrake/airbrake,CarlosCD/airbrake,CarlosCD/airbrake,thoughtbot/hoptoad_notifier,nick-desteffen/airbrake,square/hoptoad_notifier,thoughtbot/airbrake,benjaminoakes/airbrake,stevecrozz/hydraulic_brake