Fix `pgp gen help` (#14005)
Fix `pgp gen help` (#14005)

--unencrypted isn't a valid flag any more, so don't mention it.
keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client