Update dependency pymdown-extensions to v10.13

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pymdown-extensions	==10.12 -> ==10.13

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Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

v10.13

Compare Source

10.13

• NEW: Snippets: Allow multiple line numbers or line number blocks separated by ,.
• NEW: Snippets: Allow using a negative index for number start indexes and end indexes. Negative indexes are converted to positive indexes based on the number of lines in the snippet.
• FIX: Snippets: Properly capture empty newline at end of file.
• FIX: Snippets: Fix issue where when non sections of files are included, section labels are not stripped.
• FIX: BetterEm: Fixes for complex cases.
• FIX: Blocks: More consistent handling of empty newlines in block processor extensions.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.47%. Comparing base (db482bb) to head (972b48c).
Report is 51 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #225   +/-   ##
=======================================
  Coverage   99.47%   99.47%           
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  Files          11       11           
  Lines         760      760           
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  Hits          756      756           
  Misses          4        4           

Flag	Coverage Δ
macos-latest	97.48% <ø> (+0.46%)	⬆️
ubuntu-latest	97.48% <ø> (+0.46%)	⬆️
windows-latest	95.74% <ø> (+0.78%)	⬆️

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