fix: default wind unit

[y0m1g]

Displayed wind unit in m/s, but NetAtmo's API specifies that the unit for the returned wind values is km/h:

Also the schema doc specifies the default value (0) is kph:

windunit:{
  type:"number"
  example:0
  description:"0 -> kph, 1 -> mph, 2 -> ms, 3 -> beaufort, 4 -> knot"
}

The wind values displayed from this module in the MagicMirror are also consistent with what I see in NetAtmo's app from my wind gauge, my unit preference being set to km/h (so values are the same but displayed unit is different).

[CFenner]

👍