CI: (deps): Bump isort from 5.13.2 to 6.0.0 in /ci

Bumps [isort](https://github.com/pycqa/isort) from 5.13.2 to 6.0.0.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@5.13.2...6.0.0)

---
updated-dependencies:
- dependency-name: isort
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

ci/linting_requirements.txt

@@ -6,7 +6,7 @@ pyflakes==3.2.0
 
 flake8-continuation==1.0.5
 flake8-isort==6.1.1
-isort==5.13.2
+isort==6.0.0
 flake8-requirements==2.2.1
 
 flake8-rst-docstrings==0.3.0