Bump flake8-isort from 4.0.0 to 6.1.2

Bumps [flake8-isort](https://github.com/gforcada/flake8-isort) from 4.0.0 to 6.1.2.
- [Changelog](https://github.com/gforcada/flake8-isort/blob/main/CHANGES.rst)
- [Commits](gforcada/flake8-isort@4.0.0...6.1.2)

---
updated-dependencies:
- dependency-name: flake8-isort
  dependency-version: 6.1.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]