Pontoon: Update Romansh (rm) localization of Firefox Screenshots
Pontoon: Update Romansh (rm) localization of Firefox Screenshots

Localization authors:
- Martin <mcmartin@gmx.ch>

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