Add links to Huggingface from FathomNet webpage

[eor314]

Since we'll be recommending that users post their models via Zenodo, we should add a link to the Zenodo community on the webapage. Specifically in Join the FathomNet Community item 5 and the Quick External Links list on the about page.

This one will do the trick: https://zenodo.org/communities/fathomnot/?page=1&size=20

[kevinsbarnard]

Let's do this -- add link to Model Zoo directly

https://hf.co/fathomnet

[hohonuuli]

Duplicated by #123

[kevinsbarnard]

@ermbutler Will add "Model Zoo" link