Bump black from 23.7.0 to 23.9.1

Bumps [black](https://github.com/psf/black) from 23.7.0 to 23.9.1.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.7.0...23.9.1)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -21,7 +21,7 @@ mkdocs = "^1.5.2"
 mkdocs-material = "^9.3.1"
 
 [tool.poetry.dev-dependencies]
-black = "^23.7"
+black = "^23.9"
 codespell = "^2.2.5"
 flake8 = "^6.1.0"
 pep8-naming = "^0.13.3"