Update dependency markdown-it-py to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
markdown-it-py	==3.0.0 → ==4.2.0

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Release Notes

executablebooks/markdown-it-py (markdown-it-py)

v4.2.0

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• ✨ Add make_fence_rule() factory for configurable fence markers in #​394

v4.1.0

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• ✨ Add gfm-like2 preset with task lists, alerts, and single-tilde strikethrough core plugins in #​388
• ✨ Allow plugins to register inline terminator characters in #​391
• 👌 Fix quadratic complexity in fragments_join / text_join in #​389, thanks to @​petricevich
• 👌 Add --stdin option to CLI for reading Markdown from standard input in #​379, thanks to @​mcepl
• 🔧 Add typing to Scanner in #​382, thanks to @​Alunderin

Full Changelog: executablebooks/markdown-it-py@v4.0.0...v4.1.0

v4.0.0

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This primarily drops support for Python 3.9, adds support for Python 3.13,
and updates the parser to comply with Commonmark 0.31.2 and Markdown-It v14.1.0.

• ⬆️ Drop support for Python 3.9 in #​360
• ⬆️ Comply with Commonmark 0.31.2 in #​362
• 👌 Improve performance of "text" inline rule in #​347
• 👌 Use str.removesuffix in #​348
• 👌 limit the number of autocompleted cells in a table in #​364
• 👌 fix quadratic complexity in reference parser in #​367
• 🐛 Fix emphasis inside raw links bugs in #​320

Full Changelog: executablebooks/markdown-it-py@v3.0.0...v4.0.0

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