Pontoon: Update Dutch (nl) localization of Mozilla Learning Network
Pontoon: Update Dutch (nl) localization of Mozilla Learning Network

Localization authors:
- fryskefirefox <fryskefirefox@gmail.com>
- Ton <tonnes.mb@gmail.com>

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