Standardize model card for textual inversion sdxl

[stephen-iezzi]

What does this PR do?

In reference to: #6891

Standardizes textual inversion sdxl model card

Notebook link here

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• 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?

@sayakpaul

[HuggingFaceDocBuilderDev]

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[stephen-iezzi]

This should be good to merge now @sayakpaul

[sayakpaul]

Should be good to merge after the styling problems have been fixed. I have left a minor suggestion as well.

[stephen-iezzi]

Ok, I cleaned that all up! I appreciate all of your input on this @sayakpaul, I mistakenly ran isort against the file and it shuffled around the formatting of all the imports. I should've just ran make style instead.

[sayakpaul]

The code quality is still not resolved. I am afraid if that is not resolved, we cannot merge the PR.

You need to run make style && make quality. This is what I usually do:

1. Create a new Python virtual environment.
2. Activate the environment.
3. Go to diffusers directory.
4. Run pip install -e ".[quality]"
5. Then from the root level of the diffusers directory, run make style && make quality.

[stephen-iezzi]

Hmm that's odd, I copied over the imports from the current version of the file on the main branch so not sure why it was failing the tests if that is the code already on main. Either way, I ran make style and make quality and committed those changes. I'll make sure to check for these issues locally instead of creating all these unnecessary commits next time.

[sayakpaul]

Nice code quality tests are passing now. Once the CI run is complete, will merge :)

[sayakpaul]

Thanks for your contributions!