Pontoon: Update Frisian (fy-NL) localization of Thimble
Pontoon: Update Frisian (fy-NL) localization of Thimble

Localization authors:
- Fjoerfoks <fryskefirefox@gmail.com>

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