Bump mkdocs-material from 7.2.6 to 8.0.2 (#1958)

Bump mkdocs-material from 7.2.6 to 8.0.2 (#1958)

* Bump mkdocs-material from 7.2.6 to 8.0.2

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 7.2.6 to 8.0.2.
- [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](https://github.com/squidfunk/mkdocs-material/compare/7.2.6...8.0.2)

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

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* Update requirements.txt

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tom Christie <tom@tomchristie.com>