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

Localization authors:
- Davide Quaranta <dvd.forty@gmail.com>

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