[docker] latest -> nightly on docker image tag on build-docker.sh script (#11403)
[docker] latest -> nightly on docker image tag on build-docker.sh script (#11403)


ray-project/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,richardliaw/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1