message: fix(api): fix tip probing not fully self-centering
  fix
diff: @@ -35,8 +35,8 @@ def probe_instrument(instrument, robot, tip_length=None) -> Point:
  robot.poses = instrument._move(robot.poses, z=safe_height)
  for hs in hot_spots:
  - x0 = tp.center[0] + hs.x_start_offs
  - y0 = tp.center[1] + hs.y_start_offs
  + x0 = center[0] + hs.x_start_offs
  + y0 = center[1] + hs.y_start_offs
  z0 = hs.z_start_abs
  log.info("Moving to {}".format((x0, y0, z0)))
  