[RLlib] Fix doc test for foreach_worker_with_index (#30252)
[RLlib] Fix doc test for foreach_worker_with_index (#30252)

Signed-off-by: Artur Niederfahrenhorst <259dcac0d552e78e0bc7975f47adf49655882143@anyscale.com>

ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray