Bump flake8 from 6.0.0 to 7.0.0

Bumps [flake8](https://github.com/pycqa/flake8) from 6.0.0 to 7.0.0.
- [Commits](PyCQA/flake8@6.0.0...7.0.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -2,4 +2,4 @@ setuptools==69.2.0
 sphinx==5.3.0
 sphinx_rtd_theme==2.0.0
 coverage==7.4.4
-flake8==6.0.0
+flake8==7.0.0