Pontoon: Updated Serbian (sr) localization of Marketplace
Pontoon: Updated Serbian (sr) localization of Marketplace

Translation authors:
- Vanja Tumbas <tumbas93@gmail.com>

mozilla/zamboni,ingenioustechie/zamboni,luckylavish/zamboni,mozilla/zamboni,luckylavish/zamboni,diox/zamboni,shahbaz17/zamboni,washort/zamboni,diox/zamboni,elysium001/zamboni,ddurst/zamboni,diox/zamboni,ingenioustechie/zamboni,washort/zamboni,jasonthomas/zamboni,elysium001/zamboni,tsl143/zamboni,ayushagrawal288/zamboni,shahbaz17/zamboni,tsl143/zamboni,jasonthomas/zamboni,ddurst/zamboni,ddurst/zamboni,mozilla/zamboni,ingenioustechie/zamboni,ayushagrawal288/zamboni,ddurst/zamboni,luckylavish/zamboni,ingenioustechie/zamboni,tsl143/zamboni,ayushagrawal288/zamboni,washort/zamboni,washort/zamboni,diox/zamboni,jasonthomas/zamboni,shahbaz17/zamboni,shahbaz17/zamboni,ayushagrawal288/zamboni,mozilla/zamboni,tsl143/zamboni,elysium001/zamboni,elysium001/zamboni,luckylavish/zamboni,jasonthomas/zamboni