Openweathermap -> change unity m/s to km/h

[Alex-developer]

Discussed in #98

^{Originally posted by Frankastro85 February 21, 2024}
Hello,
Just a simple question. I use the OpenweatherMap on my Allsky (http://www.villageduciel.fr/allsky/).
But for me, It's clearer to have the speed of wind in km/h and not m/s. I can calculate the speed (just multiply by 3.6) but is-it possible to had a formula in the variable ? Or change directly the unity ?
Thank you