build(deps): bump mkdocs-material from 7.0.3 to 8.5.8

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 7.0.3 to 8.5.8.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Upgrade guide](https://github.com/squidfunk/mkdocs-material/blob/master/docs/upgrade.md)
- [Commits](squidfunk/mkdocs-material@7.0.3...8.5.8)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements.txt

@@ -6,7 +6,7 @@ markdown-include==0.6.0
 mdx-truly-sane-lists==1.2
 mkdocs==1.1.2
 mkdocs-exclude==1.0.2
-mkdocs-material==7.0.3
+mkdocs-material==8.5.8
 sqlalchemy
 orjson
 ujson