IndexError: list index out of range with data hosted on Zenodo
The dataset viewer sometimes raises an `IndexError`:
```
IndexError: list index out of range
```
See:
- huggingface/datasets-server#1151
  - https://huggingface.co/datasets/reddit/discussions/5
- huggingface/datasets-server#1118
  - https://huggingface.co/datasets/krr-oxford/OntoLAMA/discussions/1
- https://huggingface.co/datasets/hyperpartisan_news_detection/discussions/3
- https://huggingface.co/datasets/um005/discussions/2
- https://huggingface.co/datasets/tapaco/discussions/2
- https://huggingface.co/datasets/common_language/discussions/3
- https://huggingface.co/datasets/pass/discussions/1

After investigation:
- This happens with data files hosted on Zenodo
- Indeed, there is an underlying 429 HTTP error: Too Many Requests

Note that some time ago, it also happened with data files hosted on Google Drive. See:
  - #4581
  - #4580 

The reason then was that there was a 403 HTTP error: Forbidden

