chore(deps): update dependency markdown-it-anchor to v9

[renovate[bot]]

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown-it-anchor	^8.0.4 -> ^9.0.0

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Release Notes

valeriangalliat/markdown-it-anchor (markdown-it-anchor)

v9.2.0

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• Re-export Token and State types from markdown-it. ([#​135])

v9.1.0

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• Introduce a slugifyWithState option. ([#​125], [#​134])

v9.0.2

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• Support duplicated class attributes. ([#​133])

v9.0.1

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• Fix types following upgrade. ([#​131])

v9.0.0

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• Support markdown-it 14. This may be breaking hence the major. ([#​129], [#​128])

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Configuration

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