Update isort requirement from ==5.13.* to ==6.0.* (#4789)

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](https://github.com/pycqa/isort/compare/5.13.0...6.0.0)

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

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pyproject.toml

@@ -113,7 +113,7 @@ dev = [
   "fakeredis==2.26.*",
   "flake8==7.1.*",
   "freezegun",
-  "isort==5.13.*",
+  "isort==6.0.*",
   "pep8-naming==0.14.*",
   "potypo",
   "pytest-asyncio>=0.24",