build(deps-dev): bump flake8-isort from 6.0.0 to 6.1.1

Bumps [flake8-isort](https://github.com/gforcada/flake8-isort) from 6.0.0 to 6.1.1.
- [Changelog](https://github.com/gforcada/flake8-isort/blob/main/CHANGES.rst)
- [Commits](gforcada/flake8-isort@6.0.0...6.1.1)

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

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