docs: Add restriction of speed_factor values
docs: Add restriction of speed_factor values

Signed-off-by: Ashish Kumar <d1d3efe1aec72c9e663e189fb20e92e73f4cc781@gmail.com>

jcoupey/vroom,jcoupey/vroom,VROOM-Project/vroom,VROOM-Project/vroom,VROOM-Project/vroom