Pontoon: Update French (fr) localization of AMO Frontend
Pontoon: Update French (fr) localization of AMO Frontend

Localization authors:
- François-Joseph du Fou <francoisjoseph.du.fou@gmail.com>

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