Pontoon: Update Korean (ko) localization of Thimble
Pontoon: Update Korean (ko) localization of Thimble

Localization authors:
- Hyeonseok Shin <hyeonseok@gmail.com>
- SeulGi Choi (Chase) <cs09gi@gmail.com>

mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org