Update django-stubs to 5.2.9

[pyup-bot]

This PR updates django-stubs[compatible-mypy] from 5.2.8 to 5.2.9.

Changelog

5.2.9

New Contributors
* lee3jjang made their first contribution in https://github.com/typeddjango/django-stubs/pull/2935
* jamesbeith made their first contribution in https://github.com/typeddjango/django-stubs/pull/2956
* slafs made their first contribution in https://github.com/typeddjango/django-stubs/pull/2959
* CharString made their first contribution in https://github.com/typeddjango/django-stubs/pull/2969
* emmanuel-ferdman made their first contribution in https://github.com/typeddjango/django-stubs/pull/2970
* kelvan made their first contribution in https://github.com/typeddjango/django-stubs/pull/2988

**Full Changelog**: https://github.com/typeddjango/django-stubs/compare/5.2.8...5.2.9

Links

• PyPI: https://pypi.org/project/django-stubs
• Changelog: https://data.safetycli.com/changelogs/django-stubs/