Pontoon: Update Korean (ko) localization of AMO Frontend
Pontoon: Update Korean (ko) localization of AMO Frontend

Localization authors:
- Hyeonseok Shin <hyeonseok@gmail.com>
- rlaace423 <rlaace423@gmail.com>
- minwook-shin <minwook0106@gmail.com>

kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,aviarypl/mozilla-l10n-addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend