chore(deps): update flake8 requirement

Updates the requirements on [flake8](https://github.com/pycqa/flake8) to permit the latest version.
- [Commits](PyCQA/flake8@5.0.4...7.1.0)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:production
...

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

pyproject.toml

@@ -41,7 +41,7 @@ tests = [
 ]
 lint = [
  "pylint>=2.15.9,<3.2.0",
- "flake8>=5.0.4,<7.1.0",
+ "flake8>=5.0.4,<7.2.0",
  "pydocstyle>=6.1.1,<6.4.0",
  "black>=23.3,<24.5",
  "flake8-black~=0.3.6",