Pontoon: Update Ukrainian (uk) localization of Firefox Screenshots
Pontoon: Update Ukrainian (uk) localization of Firefox Screenshots

Localization authors:
- Artem Polivanchuk <artem@mozilla.org.ua>

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