build(deps-dev): update mkdocs requirement from 1.4.2 to 1.4.3

[dependabot[bot]]

Updates the requirements on mkdocs to permit the latest version.

Release notes

Sourced from mkdocs's releases.

1.4.3

• Bugfix: for the hooks feature, modules no longer fail to load if using some advanced Python features like dataclasses (#3193)

• Bugfix: Don't create None sitemap entries if the page has no populated URL - affects sites that exclude some files from navigation (07a297b)

• "readthedocs" theme:

  • Accessibility: add aria labels to Home logo (#3129) and search inputs (#3046)
  • "readthedocs" theme now supports hljs_style: config, same as "mkdocs" theme (#3199)

• Translations:

  • Built-in themes now also support Indonesian language (#3154)
  • Fixed zh_CN translation (#3125)
  • tr_TR translation becomes just tr - usage should remain unaffected (#3195)

See commit log.

Commits

• 3d1b011 Release 1.4.3 (#3208)
• 4ac1484 Link to Best-of-MkDocs instead of Plugins wiki in docs (#3207)
• ea1c6c4 Highlight.js style declaration in readthedocs theme (#3199)
• 97440ca Add search input field labels using aria-label (#3046)
• f3f6631 Fix accessibility issue with top-level breadcrumb in ReadTheDocs theme (#3129)
• 876995c Generalize tr_TR translations to just tr, explain how to decide this (#3195)
• 052e023 Revert functional part of previous commit - not all hosts have https
• e6189fd update links and messages to https (#3192)
• 1f1bfad Add Indonesian translations of themes (#3154)
• f5a9a7b Add hooks to sys.modules because some Python features rely on this (#3193)
• Additional commits viewable in compare view

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