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>

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