Update isort requirement from ==5.* to ==6.*

Updates the requirements on [isort](https://github.com/pycqa/isort) to permit the latest version.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@5.0.0...6.0.0)

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

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

Author: dependabot[bot]

requirements.style.txt

@@ -1,4 +1,4 @@
 # codestyle
-isort==5.*
+isort==6.*
 black==24.10.0
 autoflake==2.*