Close tag in example in README
Close tag in example in README

FirebaseExtended/emberfire,leifcr/emberfire,gerrymclarnon/emberFire,IsaiahJTurner/emberfire,19degrees/emberfire,MattMSumner/emberfire,FirebaseExtended/emberfire,rtablada/emberfire,leifcr/emberfire,19degrees/emberfire,FirebaseExtended/emberfire,MattMSumner/emberfire,gerrymclarnon/emberFire,IsaiahJTurner/emberfire,FirebaseExtended/emberfire,rtablada/emberfire