Update huggingface hub to newest version

## Description

At present HuggingFace Hub is locked at `0.25.0` in `requirements.txt`

I had to lock it at an old version because if we allow it to update then it breaks the install since the method `cached_download` has been deprecated and we get this error on all platforms.

```
ImportError: cannot import name 'cached_download' from 'huggingface_hub' (/tmp/harmony/venv/lib/python3.11/site-packages/huggingface_hub/__init__.py)
```

## Environment

Provide details regarding the operating system, toolchain, and environment.

## How to Reproduce

1. Clone Harmony as at this commit: https://github.com/harmonydata/harmony/commit/3de5b8c14e6684e053916179369c11682ba7450a
2. There is nothing in `requirements.txt` locking `huggingface-hub` to any version
3. Installation will default to `huggingface-hub==0.26.2` or whatever is currently [most recent version on Pypi](https://pypi.org/project/huggingface-hub/)
4. Error `ImportError: cannot import name 'cached_download' from 'huggingface_hub' (/tmp/harmony/venv/lib/python3.11/site-packages/huggingface_hub/__init__.py)`

## Expected Behavior

Update the code in Harmony so that it will work with a newer version of this dependency