Pontoon: Updated Punjabi (pa-IN) localization of Pontoon Intro
Pontoon: Updated Punjabi (pa-IN) localization of Pontoon Intro

Translation authors:
- inddi123in <inddi123in@gmail.com>

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