build(deps): bump django-extensions from 3.1.0 to 3.1.1

Bumps [django-extensions](https://github.com/django-extensions/django-extensions) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/django-extensions/django-extensions/releases)
- [Changelog](https://github.com/django-extensions/django-extensions/blob/master/CHANGELOG.md)
- [Commits](django-extensions/django-extensions@3.1.0...3.1.1)

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