Update docstring for glm4v

[ddeellttaa]

What does this PR do?
This PR updates the class docstring example for a multimodal model, addressing the following issues:

Corrects the input type: Changes the model input from a list to a tensor, aligning with model requirements.

Properly handles image input: Adds the image to the model input for correct multimodal inference.

Updates to processor usage: Replaces the use of tokenizer with processor for appropriate multimodal preprocessing.

These changes ensure that the documentation provides a runnable and accurate example for users working with multimodal models.

Before submitting

• [✅ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [ ✅] Did you read the contributor guideline,
  Pull Request section?
• [ ❌] Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case.
• [no need ] Did you make sure to update the documentation with your changes? Here are the
  documentation guidelines, and
  here are tips on formatting docstrings.
• [ no need] Did you write any new necessary tests?

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

[github-actions]

[For maintainers] Suggested jobs to run (before merge)

run-slow: glm4v