Fix push_to_hub in train_text_to_image_lora_sdxl.py example

[ra100]

What does this PR do?

Fixes push to hub action in train_text_to_image_lora_sdxl.py example

• in the last step it failed on missing instance_prompt, it seem the function call didn't match parameters

def save_model_card(
    repo_id: str,
    images=None,
    base_model=str,
    dataset_name=str,
    train_text_encoder=False,
    repo_folder=None,
    vae_path=None,
)

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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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• Training examples: @sayakpaul and @patrickvonplaten

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[sayakpaul]

Thank you!

[sayakpaul]

Could you please run make style && make quality so that the CI tests pass?

[ra100]

Could you please run make style && make quality so that the CI tests pass?

Sorry, I've missed that, not it should pass.

[ra100]

And now it seem, the checks fail in unrelated files already in main branch

[sayakpaul]

We're aware of it. But this doesn't restrict this PR from being merged.

@DN6 for awareness.