Bump black from 23.7.0 to 23.9.1 (#309)

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](https://github.com/psf/black/compare/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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -15,7 +15,7 @@ apprise = "^1.5.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.4.1"
-black = "^23.7.0"
+black = "^23.9.1"
 pylint = "^2.17.5"
 rope = "^1.9.0"
 mypy = "^1.5.1"