build(deps): 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>

Author: dependabot[bot]

requirements/lint.txt

@@ -6,7 +6,7 @@
 # Lint tools
 # (We are not so interested in the specific versions of the tools: the versions
 # are pinned to prevent unexpected linting failures when tools update)
-black==23.7.0
+black==23.9.1
 isort==5.12.0
 pylint==2.17.5
 mypy==1.5.1