Bump pymdown-extensions from 10.21 to 10.21.3

[dependabot]

Bumps pymdown-extensions from 10.21 to 10.21.3.

Release notes

Sourced from pymdown-extensions's releases.

10.21.3

• FIX: Fix regression that allows a snippet to be loaded outside of the base path using directory traversal when restrict_base_path is enabled (the default). Found by @​gistrec.

10.21. 2

10.21.2

• FIX: Highlight: Latest Pygments versions cannot handle a "filename" for code block titles of None.

10.20.1

• FIX: Quotes: Ensure the first class for callouts (the alert type) is always rendered lowercase.

Commits

• 4262841 Fix spelling
• 63b7835 Merge commit from fork
• 3d18550 Docs: update js deps
• a4fdd73 Skip tag 10.21.1 has we accidentally already used it
• 8afb4cd Docs: Update JS deps
• 7bf5b29 Pygments needs a non-None value for code block title (#2863)
• 20b11eb Fix some spelling and formatting
• c9edba3 Docs: strengthen Snippets warning and add security considerations
• See full diff in compare view

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.99%. Comparing base (5338a0b) to head (0a232ed).
✅ All tests successful. No failed tests found.

@@           Coverage Diff           @@
##             main      #96   +/-   ##
=======================================
  Coverage   89.99%   89.99%           
=======================================
  Files          32       32           
  Lines        3449     3449           
  Branches      347      347           
=======================================
  Hits         3104     3104           
  Misses        221      221           
  Partials      124      124           

[reznakt]

@dependabot rebase