Pontoon: Update Guarani (gn) localization of Firefox Screenshots
Pontoon: Update Guarani (gn) localization of Firefox Screenshots

Localization authors:
- Abelardo Ayala <abe_aya@hotmail.com>

mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/pageshot,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/pageshot