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

Localization authors:
- Khaled Hosny <khaledhosny@eglug.org>

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