CBRK_AIRSPD_CHK: Doc driver not started

[hamishwillee]

Fixes #14053

Clarifies that driver not started when circuit breaker enabled. A feature, as described in #14053 (comment)

[codecov]

Codecov Report

Merging #14100 into master will increase coverage by 9.46%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #14100      +/-   ##
==========================================
+ Coverage   42.33%   51.80%   +9.46%     
==========================================
  Files         605      605              
  Lines       51208    51275      +67     
==========================================
+ Hits        21680    26564    +4884     
+ Misses      29528    24711    -4817     

Flag	Coverage Δ
#mavsdk	?
#python	3.23% <ø> (+0.06%)	⬆️
#sitl_mission_FW	29.24% <ø> (-0.01%)	⬇️
#sitl_mission_MC_box	29.82% <ø> (-0.04%)	⬇️
#sitl_mission_MC_offboard_att	100.00% <ø> (ø)	⬆️
#sitl_mission_MC_offboard_pos	100.00% <ø> (ø)	⬆️
#sitl_mission_Rover	26.27% <ø> (-0.04%)	⬇️
#sitl_mission_VTOL_standard	100.00% <ø> (ø)	⬆️
#sitl_mission_VTOL_tailsitter	100.00% <ø> (ø)	⬆️
#sitl_python_FW	100.00% <ø> (+70.68%)	⬆️
#sitl_python_MC_box	100.00% <ø> (+70.06%)	⬆️
#sitl_python_MC_offboard_att	100.00% <ø> (ø)	⬆️
#sitl_python_MC_offboard_pos	100.00% <ø> (ø)	⬆️
#sitl_python_Rover	100.00% <ø> (+73.60%)	⬆️
#sitl_python_VTOL_standard	33.94% <ø> (+0.11%)	⬆️
#sitl_python_VTOL_tailsitter	100.00% <ø> (+66.10%)	⬆️
#unittest	34.75% <ø> (-65.25%)	⬇️

Impacted Files	Coverage Δ
src/modules/vtol_att_control/tailsitter.cpp	0.00% <0.00%> (-94.45%)	⬇️
...b/flight_tasks/tasks/Descend/FlightTaskDescend.cpp	0.00% <0.00%> (-83.34%)	⬇️
src/modules/navigator/land.cpp	7.14% <0.00%> (-78.58%)	⬇️
src/modules/navigator/takeoff.cpp	3.92% <0.00%> (-76.48%)	⬇️
...flight_tasks/tasks/Failsafe/FlightTaskFailsafe.cpp	0.00% <0.00%> (-73.92%)	⬇️
...flight_tasks/tasks/Offboard/FlightTaskOffboard.cpp	0.00% <0.00%> (-60.21%)	⬇️
src/modules/navigator/rtl.cpp	14.46% <0.00%> (-44.22%)	⬇️
...lib/flight_tasks/tasks/Manual/FlightTaskManual.cpp	0.00% <0.00%> (-38.89%)	⬇️
src/modules/navigator/loiter.cpp	8.16% <0.00%> (-38.78%)	⬇️
src/modules/simulator/simulator_mavlink.cpp	59.31% <0.00%> (-17.99%)	⬇️
... and 257 more