Bump markdown from 3.4.3 to 3.4.4

Bumps markdown from 3.4.3 to 3.4.4.

Changelog

Sourced from markdown's changelog.

[3.4.4] -- 2023-07-25

Fixed

• Add a special case for initial 's to smarty extension (#1305).
• Unescape any backslash escaped inline raw HTML (#1358).
• Unescape backslash escaped TOC token names (#1360).

Commits

• f99f176 Bump version to 3.4.4
• ff88261 Unescape backslash escaped TOC token names
• d60c16f Unescape any backslash escaped inline raw HTML
• 93054dd Fix XML deprecations
• dba8025 smarty: Add a special case for 's at the beginning of the token
• 07b8b2c Use pyspelling to check spelling.
• See full diff in compare view