Pontoon: Update Bulgarian (bg) localization of MDN
Pontoon: Update Bulgarian (bg) localization of MDN

Localization authors:
- Ognyan Kulev <ognyan@ognyankulev.com>

mozilla/kuma,yfdyh000/kuma,SphinxKnight/kuma,a2sheppy/kuma,mozilla/kuma,Elchi3/kuma,a2sheppy/kuma,Elchi3/kuma,Elchi3/kuma,SphinxKnight/kuma,mozilla/kuma,yfdyh000/kuma,jwhitlock/kuma,yfdyh000/kuma,mozilla/kuma,yfdyh000/kuma,escattone/kuma,mozilla/kuma,yfdyh000/kuma,a2sheppy/kuma,yfdyh000/kuma,SphinxKnight/kuma,SphinxKnight/kuma,jwhitlock/kuma,SphinxKnight/kuma,safwanrahman/kuma,Elchi3/kuma,jwhitlock/kuma,safwanrahman/kuma,a2sheppy/kuma,escattone/kuma,escattone/kuma,jwhitlock/kuma,safwanrahman/kuma,jwhitlock/kuma,safwanrahman/kuma,SphinxKnight/kuma,Elchi3/kuma,safwanrahman/kuma,a2sheppy/kuma,safwanrahman/kuma