build(deps-dev): bump mkdocstrings from 0.28.1 to 0.28.2

Bumps [mkdocstrings](https://github.com/mkdocstrings/mkdocstrings) from 0.28.1 to 0.28.2.
- [Release notes](https://github.com/mkdocstrings/mkdocstrings/releases)
- [Changelog](https://github.com/mkdocstrings/mkdocstrings/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/mkdocstrings@0.28.1...0.28.2)

---
updated-dependencies:
- dependency-name: mkdocstrings
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]