Pontoon: Update Slovenian (sl) localization of Firefox Screenshots
Pontoon: Update Slovenian (sl) localization of Firefox Screenshots

Localization authors:
- Rok Žerdin <rok.zerdin1990@gmail.com>

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