Bump black from 21.9b0 to 24.8.0

Bumps [black](https://github.com/psf/black) from 21.9b0 to 24.8.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/commits/24.8.0)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:production
...

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

requirements_test.txt

@@ -1,6 +1,6 @@
 pylint==2.11.1
 flake8==4.0.1
-black==21.9b0
+black==24.8.0
 pexpect==4.8.0
 pre-commit