[don't merge] Test hfh v0.15.0.rc0
Trying to trigger the CI differently. Still stuck on the ci-... branch (see https://github.com/huggingface/transformers/actions/runs/5143134417) so I guess I did something wrong.
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_23936). All of your documentation changes will be reflected on that endpoint.