chore(deps): update dependency marked to v18.0.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
marked (source)	18.0.3 → 18.0.4

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Release Notes

markedjs/marked (marked)

v18.0.4

Compare Source

Bug Fixes

• cache list indentation regexes (#​3969) (a37983f)
• fix cli not reading stdin (#​3967) (11adb69)

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[doistbot]

This PR updates the marked dependency to version 18.0.4, which introduces upstream bug fixes including an improvement to list indentation parsing. The update is straightforward and keeps the markdown utilities up to date, though it was noted that adding a regression test for nested lists in src/markdown.test.ts would help safeguard against future parser changes.

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[doistbot]

[P2] This bump pulls in a marked parser fix for list indentation, but src/markdown.test.ts still only exercises headings, plain text, and bold text. Add a regression test around preloadMarkdown() + renderMarkdown('- parent\n - child') so future marked bumps catch nested/indented list parsing changes in the code path this package uses.