Model card widget : array format not provided by metadata_from_config

[Wissant]

Hello! I have been running the notebook behind this tutorial :
https://skops.readthedocs.io/en/latest/auto_examples/plot_tabular_regression.html#sphx-glr-auto-examples-plot-tabular-regression-py

The model card is initialized with this command card.metadata_from_config(Path(local_repo))

After creating the model card, I went on to push the model to the hf hub. I ran into this error:

 Bad request for commit endpoint:
"widget" must be an array

I was able to overcome the issue by executing : model_card.metadata.widget = [model_card.metadata.widget] prior to saving the model card.

This is a minor error, but reporting it just in case.

[BenjaminBossan]

Yes, that's due to a recent change in huggingface_hub and is addressed in #392.