fix(deps): update dependency markdown-it to v14

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown-it	^12.0.0 -> ^14.0.0

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Release Notes

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

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.

v13.0.2

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Security

• Fixed crash/infinite loop caused by linkify inline rule, #​957.

Fixed

• Throw an error if 3rd party plugin doesn't increment line or pos counters
  (previously, markdown-it would likely go into infinite loop instead), #​847.

v13.0.1

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Fixed

• Bumped linkify-it to 4.0.1. That should fix some hangs, caused by wrong
  data, returned from linkify-it.

v13.0.0

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Added

• Added a new token type text_special to store escaped characters, same as text but
  unaffected by replacement plugins (smartquotes, typographer, linkifier, etc.).
• Added a new rule text_join in core ruler. Text replacement plugins may choose to
  insert themselves before it.

Changed

• (p) is no longer replaced with § by typographer (conflicts with ℗), #​763.
• text_collapse rule is renamed to fragments_join.

Fixed

• Smartquotes, typographic replacements and plain text links can now be escaped
  with backslash (e.g. \(c) or google\.com are no longer replaced).
• Fixed collision of emphasis and linkifier (so http://example.org/foo._bar_-_baz
  is now a single link, not emphasized). Emails and fuzzy links are not affected by this.

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