Pontoon: Update Greek (el) localization of AMO
Pontoon: Update Greek (el) localization of AMO

Localization authors:
- Jim Spentzos <jim.spentzos@outlook.com>

atiqueahmedziad/addons-server,aviarypl/mozilla-l10n-addons-server,wagnerand/addons-server,mozilla/addons-server,mozilla/olympia,kumar303/addons-server,atiqueahmedziad/addons-server,mozilla/olympia,mozilla/olympia,mozilla/addons-server,aviarypl/mozilla-l10n-addons-server,wagnerand/olympia,atiqueahmedziad/addons-server,kumar303/addons-server,eviljeff/olympia,mozilla/addons-server,kumar303/olympia,aviarypl/mozilla-l10n-addons-server,psiinon/addons-server,bqbn/addons-server,wagnerand/addons-server,psiinon/addons-server,wagnerand/addons-server,eviljeff/olympia,bqbn/addons-server,wagnerand/addons-server,atiqueahmedziad/addons-server,kumar303/olympia,wagnerand/olympia,diox/olympia,aviarypl/mozilla-l10n-addons-server,psiinon/addons-server,eviljeff/olympia,kumar303/addons-server,kumar303/olympia,diox/olympia,mozilla/addons-server,diox/olympia,diox/olympia,wagnerand/olympia,kumar303/olympia,wagnerand/olympia,eviljeff/olympia,bqbn/addons-server,psiinon/addons-server,bqbn/addons-server,kumar303/addons-server,mozilla/olympia