[data][docs] fix broken links

[matthewdeng]

Signed-off-by: Matthew Deng matt@anyscale.com

Why are these changes needed?

Follow-up to #27592.

Fixes the broken links (which didn't surface until master docs updated):

(ray-core/package-ref: line   18) broken    https://docs.ray.io/en/master/data/package-ref.html#ray.data.Dataset.map_batches - 404 Client Error: Not Found for url: https://docs.ray.io/en/master/data/package-ref.html
(ray-air/examples/torch_incremental_learning: line 110015) broken    https://docs.ray.io/en/master/data/package-ref.html?highlight=SimpleTorchDatasource#ray.data.datasource.SimpleTorchDatasource - 404 Client Error: Not Found for url: https://docs.ray.io/en/master/data/package-ref.html?highlight=SimpleTorchDatasource

Related issue number

Checks

• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

[matthewdeng]

Test failure is unrelated and transient(?)

(serve/performance: line   22) broken    https://github.com/ray-project/ray/blob/master/release/benchmarks/README.md - 500 Server Error: Internal Server Error for url: https://github.com/ray-project/ray/blob/master/release/benchmarks/README.md

https://github.com/ray-project/ray/blob/master/release/benchmarks/README.md works fine

[richardliaw]

we should update this to be a proper internal ref

[matthewdeng]

🤯 updated!