[DOC]: Bring dataset documentation up to date with datasets supported datasets API

[acostadon]

How would you describe the priority of this documentation request

Medium

Please provide a link or source to the relevant docs

https://docs.rapids.ai/api/cugraph/nightly/references/datasets/

Describe the problems in the documentation

Dataset documents...
https://docs.rapids.ai/api/cugraph/nightly/references/datasets/
https://github.com/rapidsai/cugraph/tree/branch-23.08/datasets#readme

aren't up to date with current datasets.
Need to look over datasets and update docs.

(Optional) Propose a correction

No response

Code of Conduct

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• I have searched the open documentation issues and have found no duplicates for this bug report