Pontoon: Update Japanese (ja) localization of Firefox Screenshots
Pontoon: Update Japanese (ja) localization of Firefox Screenshots

Localization authors:
- dskmori <ghoti.fish.dsk@gmail.com>

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