build(deps): Bump dependency mkdocs-material to v9.5.28

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mkdocs-material (changelog)	==9.5.25 -> ==9.5.28

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Release Notes

squidfunk/mkdocs-material (mkdocs-material)

v9.5.28: mkdocs-material-9.5.28

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• Fixed #​7313: Improved tooltips mounted in sidebar when feature is disabled

v9.5.27: mkdocs-material-9.5.27

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• Updated Estonian translations

Thanks to @​Eilyre for their contributions

v9.5.26: mkdocs-material-9.5.26

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• Fixed #​7232: Tab switches on scroll when linking tabs (9.5.19 regression)
• Fixed #​7230: Blog author avatar broken when referring to local file

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