Update mkdocstrings requirement from >=0.24,<0.28 to >=0.24,<0.29

Updates the requirements on [mkdocstrings](https://github.com/mkdocstrings/mkdocstrings) to permit the latest version.
- [Release notes](https://github.com/mkdocstrings/mkdocstrings/releases)
- [Changelog](https://github.com/mkdocstrings/mkdocstrings/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/mkdocstrings@0.24.0...0.28.0)

---
updated-dependencies:
- dependency-name: mkdocstrings
  dependency-type: direct:development
...

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

pyproject.toml

@@ -71,7 +71,7 @@ html2text = "*"
 mkdocs = "*"
 markdown-callouts = "^0.4.0"
 mkdocs-material = "^9.5.9"
-mkdocstrings = ">=0.24,<0.28"
+mkdocstrings = ">=0.24,<0.29"
 mkdocstrings-python = "^1.8.0"
 pymdown-extensions = "^10.7"
 griffe_inherited_docstrings = "*"