build(deps): update dependency aqua:rvben/rumdl to v0.2.20

[renovate]

This PR contains the following updates:

Package	Update	Change	Pending	OpenSSF
aqua:rvben/rumdl	patch	0.2.16 → 0.2.20	0.2.24 (+3)

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Release Notes

rvben/rumdl (aqua:rvben/rumdl)

v0.2.20

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Fixed

• cli: redirect removed --list-rules to the canonical commands (7a3842d)
• parser: correct code-region detection for comments and JSX fences (17f975c)

v0.2.19

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Added

• md013: add code-spans option to exempt unbreakable inline code (78896f5)
• lsp: document and workspace symbols for headings (2cef95b)

Fixed

• parser: recognize reference definitions inside blockquotes (82f4567)
• md034: don't flag reference definitions inside blockquotes (faf0fa4)
• md013: reflow list items inside blockquotes (362b5a6)

v0.2.18

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Fixed

• md013: preserve MyST directives and roles during reflow (a31a602)
• positions: char-based marker columns in MD018, MD029, MD069 (97212f3)
• positions: address review - MD037 filter, boundary-safe parser conversions, MD063 column (6fd43f7)
• positions: char-based end column in MD070; document the column convention (039a334)
• positions: use character-based end columns across remaining rules (efc29da)
• positions: report character-based columns in inline-content rules (e7fd2ee)
• positions: make shared column helpers character-based (5ca4814)
• md057: report character-based columns for non-ASCII lines (d8d07eb)

v0.2.17

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Fixed

• md077: skip footnote definition bodies in list continuation check (#​669) (388b63f) - thanks @​vEnhance
• lsp: offer quick fixes across a diagnostic's full line span (c533b75)

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