Pontoon: Update Czech (cs) localization of AMO Frontend
Pontoon: Update Czech (cs) localization of AMO Frontend

Localization authors:
- Jirka Soukeník <soucet@centrum.cz>

mozilla/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend