Bump flake8 from 6.0.0 to 6.1.0 in /requirements

Bumps [flake8](https://github.com/pycqa/flake8) from 6.0.0 to 6.1.0.
- [Commits](PyCQA/flake8@6.0.0...6.1.0)

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

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

requirements/requirements_dev.txt

@@ -4,7 +4,7 @@ catalyst==22.4
 certifi>=2022.12.7 # not directly required, pinned by Snyk to avoid a vulnerability.
 fastapi>=0.65.2
 fiona>=1.9.1
-flake8==6.0.0
+flake8==6.1.0
 geopy==2.3.0
 imageio==2.31.1
 inputimeout==1.0.4