Update black requirement from ~=24.4 to ~=24.8

Updates the requirements on [black](https://github.com/psf/black) to permit the latest version.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.4.0...24.8.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,5 +1,5 @@
 -r requirements-test.txt
-black~=24.4
+black~=24.8
 packaging~=24.1
 pre-commit~=3.7
 PyGithub~=2.3