Update README.rst (ray-project#35267)

Fixed the URL to point to the correct location

Signed-off-by: Justin Coffi <jcoffi+github@gmail.com>
Signed-off-by: Marcus Zhang <zxl265370@antgroup.com>

README.rst

@@ -44,7 +44,7 @@ Install Ray with: ``pip install ray``. For nightly wheels, see the
 `Installation page <https://docs.ray.io/en/latest/installation.html>`__.
 
 .. _`Serve`: https://docs.ray.io/en/latest/serve/index.html
-.. _`Data`: https://docs.ray.io/en/latest/data/data.html
+.. _`Data`: https://docs.ray.io/en/latest/data/dataset.html
 .. _`Workflow`: https://docs.ray.io/en/latest/workflows/concepts.html
 .. _`Train`: https://docs.ray.io/en/latest/train/train.html
 .. _`Tune`: https://docs.ray.io/en/latest/tune/index.html