Report wind values in km/h instead of m/s

[nlrb]

Currently, the app reports wind speed values in m/s, whilst Homey expects km/h. Values should be multiplied with 3.6.

This holds for Alecto v1, as well as Orgeon Scientific protocols.
For the Cresta protocol the current value is in mph, so this should be multiplied with 1.609344.
For LaCrosse & UPM it is already reported in km/h, so no change needed.