chore(deps): update dependency pymdown-extensions to v10.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pymdown-extensions	==10.16.1 → ==10.21

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Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

v10.21

10.21

• NEW: Caption: Add support for specifying not only IDs but classes and arbitrary attributes. Initial work by
  @​joapuiib.
• FIX: MagicLink: Fix a matching pattern for Bitbucket repo.

v10.20

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10.20

• NEW: Quotes: New blockquotes extension added that uses a more modern approach when compared to Python Markdown's
  default. Quotes specifically will not group consecutive blockquotes together in the same lazy fashion that the
  default Python Markdown does which follows a more modern trend to how parsers these days handle block quotes.

  In addition, Quotes also provides an optional feature to enable specifying callouts/alerts in the style used by
  GitHub and Obsidian.

v10.19.1

Compare Source

10.19.1

• FIX: Arithmatex: Fix issue where block $$ math used inline within a paragraph could result in nested math
  parsing.

v10.19

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10.19

• NEW: Emoji: Update Twemoji to use Unicode 16.
• NEW: Critic: Roll back view mode deprecation as some still like to use it, though further enhancements to this
  mode are not planned.

v10.18

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10.18

• NEW: Critic: view mode has been deprecated. To avoid warnings or future issues, explicitly set mode to
  either accept or reject. In the future, the new default will be accept and the view mode will be removed
  entirely.
• FIX: Block Admonition: important should have always been available as a default.

v10.17.2

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10.17.2

• FIX: Blocks: Blocks extensions will now better handle nesting of indented style Admonitions, Details, and Tabbed
  and other non-conflicting blocks.

v10.17.1

Compare Source

10.17.1

• FIX: Fix an issue where Highlight can override another extension in the "registered" list in Python Markdown.

v10.17

Compare Source

10.17

• NEW: Allow specifying static IDs in caption block headers via #id syntax.

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