Update Sorbian, Lower (dsb) localization of AMO Frontend (#6583)
Update Sorbian, Lower (dsb) localization of AMO Frontend (#6583)

This reapplies the commit from https://github.com/mozilla/addons-frontend/commit/1667e137daab56632e6ac7af52e5e6d113498ef0
kumar303/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend