Pontoon: Update Ukrainian (uk) localization of Mozilla Learning Network
Pontoon: Update Ukrainian (uk) localization of Mozilla Learning Network

Localization authors:
- Tymur Faradzhev <faradzhev.timur@gmail.com>

mozilla/teach.mozilla.org,mozilla/teach.mozilla.org,mozilla/teach.webmaker.org,mozilla/learning.mozilla.org,mozilla/teach.webmaker.org