Sometimes FRC value is not passed to SCD30

[oscgonfer]

Sometimes, it seems that even if we send the FRC calfactor:

SCK > monitor scd30
Time	Miliseconds	SCD30 CO2
2024-06-04T16:57:30Z	13		855
2024-06-04T16:57:30Z	13		855
2024-06-04T16:57:30Z	13		855
2024-06-04T16:57:30Z	13		855
2024-06-04T16:57:30Z	13		855
2024-06-04T16:57:30Z	12		855
SCK > control scd30 co2 calfactor 768 
SCD30 CO2: calfactor 768
Forced Recalibration Factor: 768
SCK > read scd30
SCD30 CO2: 767 ppm
SCK > monitor scd30
Time	Miliseconds	SCD30 CO2
2024-06-04T16:58:01Z	5		769
2024-06-04T16:58:01Z	15		769
2024-06-04T16:58:01Z	12		769
2024-06-04T16:58:01Z	13		769
2024-06-04T16:58:01Z	13		769

This needs to be added to the docs.