Update dependency markdown-it to v14

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown-it	^13.0.2 -> ^14.1.0

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Release Notes

markdown-it/markdown-it (markdown-it)

v14.1.0

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Changed

• Updated CM spec compatibility to 0.31.2, #​1009.

Fixed

• Fixed quadratic complexity when parsing references, #​996.
• Fixed quadratic output size with pathological user input in tables, #​1000.

v14.0.0

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Changed

• Drop ancient browsers support (use .fromCodePoint and other features).
• Rewrite to ESM (including all plugins/deps). CJS fallback still available.
  No signatures changed, except markdown-it-emoji plugin.
• Dropped dist/ folder from repo, build on package publish.
• Set punicode.js as external dependency.

Fixed

• Html tokens inside img alt are now rendered as their original text, #​896.
• Hardbreaks inside img alt are now rendered as newlines.

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