Pontoon: Update Vietnamese (vi) localization of AMO
Pontoon: Update Vietnamese (vi) localization of AMO

Co-authored-by: Đặng Duy Thanh <e982a8420ee99369ecd58ef1d862ace9ca7f1a91@gmail.com>

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