build(deps): update djangorestframework requirement

build(deps): update djangorestframework requirement

Updates the requirements on [djangorestframework](https://github.com/encode/django-rest-framework) to permit the latest version.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.15.2...3.16.1)

---
updated-dependencies:
- dependency-name: djangorestframework
  dependency-version: 3.16.1
  dependency-type: direct:production
...

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