Pontoon: Update Norwegian Nynorsk (nn-NO) localization of AMO Frontend
Pontoon: Update Norwegian Nynorsk (nn-NO) localization of AMO Frontend

Localization authors:
- Björn I. <bjorni.svindseth@yahoo.com>

kumar303/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,tsl143/addons-frontend