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:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -31,7 +31,7 @@ dev = [
     "flit==3.9.0",
     "isort==5.12.0",
     "flake8==6.1.0",
-    "black==23.7.0",
+    "black==23.9.1",
     "pytest==7.4.2",
     "pytest-cov==4.1.0",
     "responses==0.23.3",