Update django-stubs to 5.2.8

[pyup-bot]

This PR updates django-stubs[compatible-mypy] from 5.2.7 to 5.2.8.

Changelog

5.2.8

What's Changed
* Run tests against the lowest supported django version by UnknownPlatypus in https://github.com/typeddjango/django-stubs/pull/2862
* fix: allow `django.shortcuts.resolve_url` to receive a str-promise by alexei in https://github.com/typeddjango/django-stubs/pull/2869
* fix: add type declarations for some missing settings by alexei in https://github.com/typeddjango/django-stubs/pull/2870
* fix: import all forms widgets by alexei in https://github.com/typeddjango/django-stubs/pull/2871
* Update assertContains and assertNotContains signatures by SebCorbin in https://github.com/typeddjango/django-stubs/pull/2880
* Update middleware types by UnknownPlatypus in https://github.com/typeddjango/django-stubs/pull/2884
* Remove `str` from enum label types when we know for sure the labels are lazy by rchen152 in https://github.com/typeddjango/django-stubs/pull/2888
* Switch Dependabot to Renovate by intgr in https://github.com/typeddjango/django-stubs/pull/2893
* CI: Only run branch tests on Renovate branches where it's needed by intgr in https://github.com/typeddjango/django-stubs/pull/2899
* fix: in db.models make required_db_vendor str by Tatsh in https://github.com/typeddjango/django-stubs/pull/2909
* Run pyrefly over test cases by rchen152 in https://github.com/typeddjango/django-stubs/pull/2914
* Mypy 1.19 by sobolevn in https://github.com/typeddjango/django-stubs/pull/2919

New Contributors
* alexei made their first contribution in https://github.com/typeddjango/django-stubs/pull/2869
* SebCorbin made their first contribution in https://github.com/typeddjango/django-stubs/pull/2880
* rchen152 made their first contribution in https://github.com/typeddjango/django-stubs/pull/2888
* renovate[bot] made their first contribution in https://github.com/typeddjango/django-stubs/pull/2895

**Full Changelog**: https://github.com/typeddjango/django-stubs/compare/5.2.7...5.2.8

Links

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