fix wheel building doc (#4360)
fix wheel building doc (#4360)


pcmoritz/ray-1,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,ray-project/ray,stephanie-wang/ray,atumanov/ray,pcmoritz/ray-1,ujvl/ray-ng,ujvl/ray-ng,stephanie-wang/ray,robertnishihara/ray,stephanie-wang/ray,ray-project/ray,atumanov/ray,robertnishihara/ray,atumanov/ray,ujvl/ray-ng,atumanov/ray,stephanie-wang/ray,robertnishihara/ray,atumanov/ray,stephanie-wang/ray,pcmoritz/ray-1,ray-project/ray,stephanie-wang/ray,robertnishihara/ray,ray-project/ray,robertnishihara/ray,robertnishihara/ray,pcmoritz/ray-1,pcmoritz/ray-1,stephanie-wang/ray,atumanov/ray,ray-project/ray,ray-project/ray,robertnishihara/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,richardliaw/ray,stephanie-wang/ray,atumanov/ray,robertnishihara/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,richardliaw/ray,atumanov/ray,ujvl/ray-ng