chat: remove [chat] qualifier from documentation

[AndyTWF]

Description

Using the [chat] qualifier has recently been deprecated. This change removes it from the docs.

Checklist

• Commits have been rebased.
• Linting has been run against the changed file(s).
• The PR adheres to the writing style guide and contribution guide.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chat-qualifier

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