Fix model name in the notebook

[pamelafox]

Purpose

Fix model_name variable. The other changes are just different output from LLM, no functional changes.

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

[Copilot]

Pull Request Overview

This PR fixes a model name variable bug in the chat vision notebook. Previously, the code was incorrectly using os.environ["OPENAI_MODEL"] instead of the model_name variable that was properly defined earlier in the notebook.

• Fixed variable reference from environment variable to proper model_name variable
• Updated LLM output examples throughout notebooks (non-functional changes)
• Updated Python version metadata in notebook

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
notebooks/chat_vision.ipynb	Fixed model variable reference and updated LLM output examples
notebooks/chat_pdf_images.ipynb	Updated LLM output examples and package installation logs

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