[Data] Fix broken link in warning message (ray-project#39770)

We raise this warning message:

> Warning: The Ray cluster currently does not have any available CPUs. The Dataset job will hang unless more CPUs are freed up. A common reason is that cluster resources are used by Actors or Tune trials; see the following link for more details: https://docs.ray.io/en/master/data/dataset-internals.html#datasets-and-tune

But the link has changed.

Signed-off-by: Balaji Veeramani <[email protected]>

python/ray/data/_internal/plan.py

@@ -571,7 +571,7 @@ def execute(
  "are freed up. A common reason is that cluster resources are "
  "used by Actors or Tune trials; see the following link "
  "for more details: "
- "https://docs.ray.io/en/master/data/dataset-internals.html#datasets-and-tune" # noqa: E501
+ "https://docs.ray.io/en/latest/data/data-internals.html#ray-data-and-tune" # noqa: E501
  )
  if not self.has_computed_output():
  if self._run_with_new_execution_backend():