Update generating-crud-page.md

[AbdurRahmanMZag]

inversed description for entity types author and book

Description

Resolves #xxxx (write the related issue number if available)

TODO: Describe what this PR has changed, add screenshot or animated GIF if available, write if it is a breaking change, and how to fix the breaking changes for existing applications if so.

Checklist

• [ ] I fully tested it as developer / designer and created unit / integration tests
• [ ] I documented it (or no need to document or I will create a separate documentation issue)

How to test it?

Please describe how this can be tested by the test engineers if it is not already explicit - or remove this section if no need to description.

[CLAassistant]

All committers have signed the CLA.

[AbdurRahmanMZag]

It leads to confusion to have such a mistake.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.