Bump mkdocs-material from 9.6.23 to 9.7.0 in /buildenv

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.6.23 to 9.7.0.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.23...9.7.0)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.7.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

buildenv/requirements.txt

@@ -69,7 +69,7 @@ mkdocs-get-deps==0.2.0
     # via mkdocs
 mkdocs-macros-plugin==1.4.1
     # via -r requirements.in
-mkdocs-material==9.6.23
+mkdocs-material==9.7.0
     # via -r requirements.in
 mkdocs-material-extensions==1.3
     # via mkdocs-material