changed GPG language
changed GPG language

Previous version suggested the installer might have already created a GPG public key for securedrop when there was no opportunity to, so I clarified.
micahflee/securedrop,conorsch/securedrop,jrosco/securedrop,harlo/securedrop,jeann2013/securedrop,jeann2013/securedrop,heartsucker/securedrop,harlo/securedrop,jrosco/securedrop,jrosco/securedrop,jaseg/securedrop,jeann2013/securedrop,kelcecil/securedrop,garrettr/securedrop,kelcecil/securedrop,pwplus/securedrop,conorsch/securedrop,ageis/securedrop,GabeIsman/securedrop,harlo/securedrop,jeann2013/securedrop,pwplus/securedrop,GabeIsman/securedrop,garrettr/securedrop,jrosco/securedrop,pwplus/securedrop,harlo/securedrop,kelcecil/securedrop,harlo/securedrop,jaseg/securedrop,ehartsuyker/securedrop,pwplus/securedrop,jaseg/securedrop,garrettr/securedrop,chadmiller/securedrop,GabeIsman/securedrop,kelcecil/securedrop,heartsucker/securedrop,micahflee/securedrop,conorsch/securedrop,GabeIsman/securedrop,jaseg/securedrop,jeann2013/securedrop,jrosco/securedrop,chadmiller/securedrop,pwplus/securedrop,kelcecil/securedrop,ageis/securedrop,GabeIsman/securedrop,chadmiller/securedrop,conorsch/securedrop,jrosco/securedrop,chadmiller/securedrop,garrettr/securedrop,heartsucker/securedrop,harlo/securedrop,ageis/securedrop,ehartsuyker/securedrop,pwplus/securedrop,ageis/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,chadmiller/securedrop,micahflee/securedrop,chadmiller/securedrop,conorsch/securedrop,jeann2013/securedrop,kelcecil/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,micahflee/securedrop,jaseg/securedrop,heartsucker/securedrop,jaseg/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop