fix: Code examples for the association_rules method have an execution…

[MarceloNunesAlves]

Description

This Pull Request addresses an error in the example codes for the association_rules method. Recently, the num_itemsets parameter was added as a required parameter, but it was not included in the existing examples. This update ensures all code examples execute correctly by adding the num_itemsets parameter where necessary.

Related issues or pull requests

#1004

Pull Request Checklist

• Added a note about the modification or contribution to the ./docs/sources/CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./mlxtend/*/tests directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under mlxtend/docs/sources/ (if applicable)
• Ran PYTHONPATH='.' pytest ./mlxtend -sv and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., PYTHONPATH='.' pytest ./mlxtend/classifier/tests/test_stacking_cv_classifier.py -sv)
• Checked for style issues by running flake8 ./mlxtend

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[rasbt]

Thanks, I appreciate the update!