Pontoon: Update Italian (it) localization of AMO Frontend
Pontoon: Update Italian (it) localization of AMO Frontend

Localization authors:
- Francesco Lodolo <francesco.lodolo@mozillaitalia.org>

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