Update dependency markdown-it to v11

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
markdown-it	dependencies	major	^10.0.0 -> ^11.0.0

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Release Notes

markdown-it/markdown-it

v11.0.0

Compare Source

Changed

• Bumped linkify-it to 3.0.0, #​661 + allow unlimited . inside links.
• Dev deps bump.
• Switch to nyc for coverage reports.
• Partially moved tasks from Makefile to npm scripts.
• Automate web update on npm publish.

Fixed

• Fix em- and en-dashes not being typographed when separated by 1 char, #​624.
• Allow opening quote after another punctuation char in typographer, #​641.
• Assorted wording & typo fixes.

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