BUG: step_detect: include weights in sigma_star
BUG: step_detect: include weights in sigma_star

Forgot to add weighting to the MLE sigma calculation.

airspeed-velocity/asv,spacetelescope/asv,airspeed-velocity/asv,spacetelescope/asv,spacetelescope/asv,airspeed-velocity/asv,airspeed-velocity/asv,spacetelescope/asv