chore(deps): Bump pymdown-extensions from 10.21.2 to 10.21.3

[dependabot]

Bumps pymdown-extensions from 10.21.2 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.

Commits

• 4262841 Fix spelling
• 63b7835 Merge commit from fork
• 3d18550 Docs: update js deps
• See full diff in compare view

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[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 0 duplication

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[codacy-production]

Pull Request Overview

This PR updates pymdown-extensions to version 10.21.3, which addresses a security regression related to directory traversal. Codacy indicates that the PR is up to standards, and no logic or quality issues were found in the requirements.txt change.

While the version bump is correct, the review process identified a gap in testing: there is no automated verification in the PR to ensure the documentation site builds correctly or that the security vulnerability is effectively mitigated in this environment.

Test suggestions

• Verify that the MkDocs documentation site builds successfully with the updated extension version.
• Verify that directory traversal attempts are blocked when using snippets with restrict_base_path enabled.

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Verify that the MkDocs documentation site builds successfully with the updated extension version.
2. Verify that directory traversal attempts are blocked when using snippets with restrict_base_path enabled.

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