Pontoon: Update French (fr) localization of Mozilla Learning Network
Pontoon: Update French (fr) localization of Mozilla Learning Network

Localization authors:
- Théo Chevalier <theo.chevalier11@gmail.com>

mozilla/teach.mozilla.org,mozilla/teach.webmaker.org,mozilla/learning.mozilla.org,mozilla/teach.mozilla.org,mozilla/teach.webmaker.org