Conversion of Current Wind Speed from m/s to mph

[g0ods]

Hi there,
I'm new to GitHub so am not sure if this is the best way to raise a bug report. In my understanding wind speed from Weatherbit.IO comes as m/s, which to convert to km/h you need to multiply by 3.6, similarly to convert from m/s to mph you need to multiply by 2.24, so in WeatherPiTFT.py the following line, line #731
wind_speed = wind_speed * 3.6 if METRIC else wind_speed
perhaps should be something like
wind_speed = wind_speed * 3.6 if METRIC else wind_speed * 2.2

BTW I love your work on this project,
g0ods.