Fixed typo in PhoneNumberError description.
Fixed typo in PhoneNumberError description.

nextforce/PhoneNumberKit,Jean-Daniel/PhoneNumberKit,nextforce/PhoneNumberKit,Jean-Daniel/PhoneNumberKit,marmelroy/PhoneNumberKit,christopherweems/PhoneNumberKit,christopherweems/PhoneNumberKit,christopherweems/PhoneNumberKit,nextforce/PhoneNumberKit,marmelroy/PhoneNumberKit,Jean-Daniel/PhoneNumberKit,marmelroy/PhoneNumberKit,marmelroy/PhoneNumberKit