fix link in the docs

[coding-famer]

What does this PR do?

Fix a link in the docs, which used to be hf.co/docs/datasets and will be directed to https://huggingface.co/docs/diffusers/main/en/training/hf.co/docs/datasets.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Did you write any new necessary tests?

Who can review?

@stevhliu @sayakpaul

[hlky]

@coding-famer Thanks for spotting this! Looks like there are some other links with the same issue that we can address here or with a follow up PR.

[coding-famer]

@coding-famer Thanks for spotting this! Looks like there are some other links with the same issue that we can address here or with a follow up PR.

@hlky fixed.

[hlky]

Awesome! The additional fixes are greatly appreciated 🤗

[stevhliu]

Thanks!

[HuggingFaceDocBuilderDev]

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