⬆ Update mkdocs-material requirement from 9.1.21 to 9.2.7 (#675)

Updates the requirements on [mkdocs-material](https://github.com/squidfunk/mkdocs-material) to permit the latest version.
- [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/9.1.21...9.2.7)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-type: direct:development
...

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pyproject.toml

@@ -40,7 +40,7 @@ pytest = "^7.0.1"
 mypy = "1.4.1"
 # Needed by the code generator using templates
 black = ">=22.10,<24.0"
-mkdocs-material = "9.1.21"
+mkdocs-material = "9.2.7"
 pillow = "^9.3.0"
 cairosvg = "^2.5.2"
 mdx-include = "^1.4.1"