build(deps-dev): Bump mkdocstrings[python-legacy] from 0.19.0 to 0.26.1

Bumps [mkdocstrings[python-legacy]](https://github.com/mkdocstrings/mkdocstrings) from 0.19.0 to 0.26.1.
- [Release notes](https://github.com/mkdocstrings/mkdocstrings/releases)
- [Changelog](https://github.com/mkdocstrings/mkdocstrings/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/mkdocstrings@0.19.0...0.26.1)

---
updated-dependencies:
- dependency-name: mkdocstrings[python-legacy]
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

setup.cfg

@@ -80,7 +80,7 @@ dev =
     types-setuptools
     # # Docs website
     mkdocs==1.5.0
-    mkdocstrings[python-legacy]==0.19.0
+    mkdocstrings[python-legacy]==0.26.1
     mkdocs-material
     markdown-include
     pymdown-extensions