chore(deps): update dependency pymdown-extensions to v10.16

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pymdown-extensions	==10.15 -> ==10.16

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Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

v10.16

Compare Source

10.16

• NEW: Add early support for Python 3.14.
• NEW: Drop support for Python 3.8.
• NEW: Snippets: Added max_retries and backoff_retries options to configure new retry logic for HTTP 429
  errors (Too Many Requests client error).
• NEW: Caption: Prefix templates are now preserved exactly as specified allowing the insertion of HTML tags if
  desired.
• FIX: Caption: Fix issue where manual numbers in auto were not respected appropriately.

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