Pontoon: Update Italian (it) localization of Thimble
Pontoon: Update Italian (it) localization of Thimble

Localization authors:
- Sara Todaro <sara.todaro@mozillaitalia.org>

humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org