Bump black from 24.4.2 to 24.8.0 in /requirements (#379)

Bumps [black](https://github.com/psf/black) from 24.4.2 to 24.8.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.4.2...24.8.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/requirements-testing.txt

@@ -5,7 +5,7 @@ pytest==8.3.2
 pytest-cov==5.0.0
 
 # linting & formatting
-black==24.4.2
+black==24.8.0
 autoflake==2.3.1
 isort==5.13.2
 flake8==7.1.0