notebook fails to render directly on GitHub

### Bug Description
The tutorial notebook fails to render directly on GitHub and throws an invalid notebook error.

### Error Message
Invalid Notebook
There was an error rendering your Notebook: the 'state' key is missing from 'metadata.widgets'. Add 'state' to each, or remove 'metadata.widgets'.
Using nbformat v5.10.4 and nbconvert v7.17.1

### Steps to Reproduce
1. Navigate to the notebook file in this repository.
2. Observe the rendering error instead of the notebook content.

### Suggested Fix for Maintainers
This is usually caused by an empty or malformed `widgets` extension state. Opening the notebook locally, clearing all widget states/cell outputs, and re-saving the notebook before pushing should resolve the rendering issue on GitHub.

Find the tutorial notebook in the repository and open it locally; inspect metadata.widgets and clear all widget states and cell outputs before re-saving. Confirm the saved notebook renders directly on GitHub without the invalid notebook error.

Escrita pelo modelo de indexação a partir do texto da issue.