Pontoon: Update Slovak (sk) localization of WebThings Gateway
Pontoon: Update Slovak (sk) localization of WebThings Gateway

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

moziot/gateway,moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway