Bump mkdocs-material from 6.2.6 to 7.0.6 in /docs (#106)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 6.2.6 to 7.0.6.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/docs/changelog.md)
- [Commits](squidfunk/mkdocs-material@6.2.6...7.0.6)

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

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

docs/requirements.txt

@@ -1,4 +1,4 @@
 mkdocs==1.1.2
-mkdocs-material==6.2.6
+mkdocs-material==7.0.6
 mkdocs-simple-plugin==0.4.0
 mdx_truly_sane_lists==1.2