Pontoon: Updated Lower Sorbian (dsb) localization of Pontoon Intro
Pontoon: Updated Lower Sorbian (dsb) localization of Pontoon Intro

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

mathjazz/pontoon-intro,mathjazz/pontoon-intro,jotes/pontoon-intro,jotes/pontoon-intro,Osmose/pontoon-intro,Osmose/pontoon-intro,mathjazz/pontoon-intro,Osmose/pontoon-intro,jotes/pontoon-intro