Bump flake8-isort from 4.1.1 to 5.0.0

Bumps [flake8-isort](https://github.com/gforcada/flake8-isort) from 4.1.1 to 5.0.0.
- [Release notes](https://github.com/gforcada/flake8-isort/releases)
- [Changelog](https://github.com/gforcada/flake8-isort/blob/master/CHANGES.rst)
- [Commits](gforcada/flake8-isort@4.1.1...5.0.0)

---
updated-dependencies:
- dependency-name: flake8-isort
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements/local.txt

@@ -23,7 +23,7 @@ sphinx-autobuild==2021.3.14 # https://github.com/GaretJax/sphinx-autobuild
 # Code quality
 # ------------------------------------------------------------------------------
 flake8==4.0.1  # https://github.com/PyCQA/flake8
-flake8-isort==4.1.1  # https://github.com/gforcada/flake8-isort
+flake8-isort==5.0.0  # https://github.com/gforcada/flake8-isort
 coverage==6.2  # https://github.com/nedbat/coveragepy
 black==22.10.0  # https://github.com/psf/black
 pylint-django==2.5.3  # https://github.com/PyCQA/pylint-django