Update black requirement from <25 to <26

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@18.3a0...25.1.0)

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

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

pyproject.toml

@@ -29,7 +29,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["black<25", "mypy", "pylint"]
+dev = ["black<26", "mypy", "pylint"]
 test = [
   "pytest",
   "pytest-asyncio",