Update djangorestframework-stubs to 3.15.0

[pyup-bot]

This PR updates djangorestframework-stubs[compatible-mypy] from 3.14.5 to 3.15.0.

Changelog

3.15.0

New Contributors
* asottile-sentry made their first contribution in https://github.com/typeddjango/djangorestframework-stubs/pull/546
* Viicos made their first contribution in https://github.com/typeddjango/djangorestframework-stubs/pull/539
* Alexerson made their first contribution in https://github.com/typeddjango/djangorestframework-stubs/pull/530
* igorgaming made their first contribution in https://github.com/typeddjango/djangorestframework-stubs/pull/567
* saJaeHyukc made their first contribution in https://github.com/typeddjango/djangorestframework-stubs/pull/574

**Full Changelog**: https://github.com/typeddjango/djangorestframework-stubs/compare/3.14.5...3.15.0

Links

• PyPI: https://pypi.org/project/djangorestframework-stubs
• Changelog: https://data.safetycli.com/changelogs/djangorestframework-stubs/
• Repo: https://github.com/typeddjango/djangorestframework-stubs