Autocalibration is `off` by default for SCD30 CO2 sensors

[oscgonfer]

For a newly flashed device:

SCK > read co2
SCD30 CO2: 696 ppm
SCK > control co2
SCD30 CO2: 
Wrong command!!
Options:
interval [2-1000 (seconds)]
autocal [on/off]
calfactor [400-2000 (ppm)]
caltemp [newTemp/off]
pressure
SCK > control co2 autocal
SCD30 CO2: autocal
Auto Self Calibration: off

By default, it should be:

SCD30 CO2: autocal
Auto Self Calibration: on