Update mkdocs-material to 5.2.3

[pyup-bot]

This PR updates mkdocs-material from 5.2.2 to 5.2.3.

Changelog

5.2.3

* Improved search typeahead behavior for some languages (de, fr, ...)
* Improved styles for scrollbars on Firefox
* Fixed 1741: Removed preconnect hint for Google Analytics

Links

• PyPI: https://pypi.org/project/mkdocs-material
• Changelog: https://pyup.io/changelogs/mkdocs-material/
• Repo: https://squidfunk.github.io/mkdocs-material/

[coveralls]

Pull Request Test Coverage Report for Build 807

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 99.263%

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Totals
Change from base Build 804:	0.02%
Covered Lines:	1617
Relevant Lines:	1629

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #131