Update chat_extras.md with content correction

[krishkkk]

What does this PR do?

Fixed a typo in the content, that may confuse the readers.

Before submitting

• [x ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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  Pull Request section?
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• Did you make sure to update the documentation with your changes? Here are the
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  here are tips on formatting docstrings.
• Did you write any new necessary tests?

[github-actions]

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[Rocketknight1]

Yes, this is correct, thank you!