chore(deps-dev): update mkdocs-material requirement

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@9.5.40...9.7.6)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.7.6
  dependency-type: direct:development
...

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Author: dependabot[bot]

pyproject.toml

@@ -6,7 +6,7 @@ requires-python = ">=3.12"
 dependencies = []
 
 [dependency-groups]
-docs = ["mkdocs-material[imaging]>=9.5.40", "mkdocs-redirects>=1.2.2"]
+docs = ["mkdocs-material[imaging]>=9.7.6", "mkdocs-redirects>=1.2.2"]
 stac-geoparquet = [
     "deepdiff>=8.0.1",
     "pyarrow>=17.0.0",