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:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -29,7 +29,7 @@ python-markdown-math==0.6
 PyYAML==6.0.1
 
 # Style checker
-flake8==6.0.0
+flake8==7.0.0
 flake8-docstrings==1.7.0
 flake8-quotes==3.3.2
 pep8-naming==0.13.3