[docs] Add codeowners for subdirectories (#27569)
[docs] Add codeowners for subdirectories (#27569)

Signed-off-by: 83291918a5a7feee650621586675d90bcd81c68d@cs.berkeley.edu

CODEOWNERS only respects the last matching entry for a file. This PR hopefully adds the top-level docs group to all subdirs.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray