build(deps): bump the docs group in /docs with 2 updates

build(deps): bump the docs group in /docs with 2 updates

Bumps the docs group in /docs with 2 updates: [mkdocs-material](https://github.com/squidfunk/mkdocs-material) and [mkdocs-macros-plugin](https://github.com/fralau/mkdocs_macros_plugin).

Updates `mkdocs-material` from 9.6.16 to 9.6.21
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](https://github.com/squidfunk/mkdocs-material/compare/9.6.16...9.6.21)

Updates `mkdocs-macros-plugin` from 1.3.7 to 1.4.0
- [Release notes](https://github.com/fralau/mkdocs_macros_plugin/releases)
- [Changelog](https://github.com/fralau/mkdocs-macros-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fralau/mkdocs_macros_plugin/compare/v1.3.7...v1.4.0)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.6.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docs
- dependency-name: mkdocs-macros-plugin
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docs
...

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