build(deps): bump mkdocs-material from 9.6.22 to 9.7.2 in /docs

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.6.22 to 9.7.2.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.22...9.7.2)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.7.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -105,7 +105,7 @@ mkdocs-click==0.9.0
     # via mavros-tools
 mkdocs-get-deps==0.2.0
     # via mkdocs
-mkdocs-material==9.6.22
+mkdocs-material==9.7.2
     # via mavros-tools
 mkdocs-material-extensions==1.3.1
     # via mkdocs-material