Update builder hash with info
Currently if you change the `dataset_info` of a dataset (e.g. in the YAML part of the README.md), the cache ignores this change.

This is problematic because you want to regenerate a dataset if you change the features or the split sizes for example (e.g. after push_to_hub)

Ideally we should take the resolved files into account as well but this will be for another PR