Update beans download urls
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_3890). All of your documentation changes will be reflected on that endpoint. @albertvillanova Thanks for investigating and fixing that issue. I regenerated the `dataset_infos.json` file.
Replace the old URLs with the Hub [URLs](https://huggingface.co/datasets/beans/tree/main/data).

Also reported by @stevhliu. 

Fix #3889 