fix(deps): update dependency markdown to v3.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown (changelog)	==3.6 -> ==3.7

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Release Notes

Python-Markdown/markdown (markdown)

v3.7

Compare Source

Changed

Refactor abbr Extension

A new AbbrTreeprocessor has been introduced, which replaces the now deprecated
AbbrInlineProcessor. Abbreviation processing now happens after Attribute Lists,
avoiding a conflict between the two extensions (#​1460).

The AbbrPreprocessor class has been renamed to AbbrBlockprocessor, which
better reflects what it is. AbbrPreprocessor has been deprecated.

A call to Markdown.reset() now clears all previously defined abbreviations.

Abbreviations are now sorted by length before executing AbbrTreeprocessor
to ensure that multi-word abbreviations are implemented even if an abbreviation
exists for one of those component words. (#​1465)

Abbreviations without a definition are now ignored. This avoids applying
abbr tags to text without a title value.

Added an optional glossary configuration option to the abbreviations extension.
This provides a simple and efficient way to apply a dictionary of abbreviations
to every page.

Abbreviations can now be disabled by setting their definition to "" or ''.
This can be useful when using the glossary option.

Fixed

• Fixed links to source code on GitHub from the documentation (#​1453).

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