build(deps-dev): bump django-stubs from 5.0.4 to 5.1.0

Bumps [django-stubs](https://github.com/typeddjango/django-stubs) from 5.0.4 to 5.1.0.
- [Release notes](https://github.com/typeddjango/django-stubs/releases)
- [Commits](typeddjango/django-stubs@5.0.4...5.1.0)

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

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