Bump black from 24.3.0 to 26.3.1

Bumps [black](https://github.com/psf/black) from 24.3.0 to 26.3.1.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.3.0...26.3.1)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 26.3.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,4 +1,4 @@
 flake8==3.7.9
-black==24.3.0
+black==26.3.1
 isort==4.3.21
 unify==0.5