README example load_dataset(<remote datapackage>) returns 'Invalid Dataset'

[roll]

README example load_dataset(<remote Frictionless datapackage>) returns "Invalid Dataset".

Environment

• fairspec 0.1.4 (installed from PyPI)
• Python 3.12.3, Linux
• Reproduced in a clean virtualenv against the published wheel.

Repro (verbatim from README.md)

from fairspec import load_dataset
dataset = load_dataset(
    "https://raw.githubusercontent.com/roll/currency-codes/refs/heads/master/datapackage.json"
)

Actual

FairspecException: Invalid Dataset

The URL is reachable (verified: the descriptor downloads, ~2 KB), so this is a validation/compatibility failure, not a network issue. The README presents this as a working "load a dataset from a remote descriptor" example.

Expected: the documented example loads the dataset, or the README is updated to a descriptor that load_dataset accepts. If Frictionless datapackage.json descriptors are intentionally unsupported, a clearer error and a doc note would help.

[avinashkamat48]

Opened #17 to replace the unsupported Frictionless datapackage.json README example with the supported Zenodo dataset source already used elsewhere in the README.