Pontoon: Update Slovak (sk) localization of Test Pilot Website
Pontoon: Update Slovak (sk) localization of Test Pilot Website

Localization authors:
- Juraj Cigáň <kusavica@gmail.com>

mozilla/idea-town-server,lmorchard/testpilot,lmorchard/idea-town,lmorchard/idea-town,lmorchard/testpilot,lmorchard/idea-town-server,mozilla/idea-town,lmorchard/idea-town-server,mozilla/idea-town,meandavejustice/testpilot,meandavejustice/testpilot,mozilla/idea-town-server,meandavejustice/testpilot,flodolo/testpilot,lmorchard/testpilot,mozilla/idea-town-server,flodolo/testpilot,flodolo/testpilot,lmorchard/testpilot,mozilla/idea-town-server,mozilla/idea-town,lmorchard/idea-town-server,lmorchard/idea-town,lmorchard/idea-town-server,lmorchard/idea-town,meandavejustice/testpilot,mozilla/idea-town,flodolo/testpilot