build(deps): update mkdocs-material requirement from ~=9.7.1 to ~=9.7.3 (#1088)

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](squidfunk/mkdocs-material@9.7.1...9.7.3)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.7.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-docs.txt

@@ -1,5 +1,5 @@
 markdown-include~=0.8.1
 mkdocs~=1.6.1
-mkdocs-material~=9.7.1
+mkdocs-material~=9.7.4
 pygments~=2.19.2
 pymdown-extensions~=10.21