Bump flake8 from 5.0.3 to 5.0.4

Bumps [flake8](https://github.com/pycqa/flake8) from 5.0.3 to 5.0.4.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@5.0.3...5.0.4)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -44,7 +44,7 @@ pytest = "^7.1.2"
 pytest-django = "^4.5.2"
 coverage = "^6.4"
 pytest-cov = "^3.0.0"
-flake8 = "^5.0.3"
+flake8 = "^5.0.4"
 black = "^22.6.0"
 mypy = "^0.971"
 django-stubs = "^1.12.0"