Pontoon: Update Arabic (ar) localization of Firefox Screenshots
Pontoon: Update Arabic (ar) localization of Firefox Screenshots

Localization authors:
- Abdalrahman Hwoij <howij1995@gmail.com>

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