Pontoon: Update Sorbian, Upper (hsb) localization of Thimble
Pontoon: Update Sorbian, Upper (hsb) localization of Thimble

Localization authors:
- Michael Wolf <milupo@sorbzilla.de>

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