Pontoon: Update Sorbian, Lower (dsb) localization of AMO
Pontoon: Update Sorbian, Lower (dsb) localization of AMO

Co-authored-by: Michael Wolf <e8befa84751932ca5e4e5de995df961d4c44e4ca@sorbzilla.de>

bqbn/addons-server,wagnerand/addons-server,wagnerand/addons-server,mozilla/addons-server,mozilla/addons-server,bqbn/addons-server,mozilla/olympia,bqbn/addons-server,mozilla/olympia,mozilla/olympia,mozilla/addons-server,mozilla/addons-server,diox/olympia,diox/olympia,diox/olympia,bqbn/addons-server,diox/olympia,wagnerand/addons-server,wagnerand/addons-server,mozilla/olympia