Bump djangorestframework from 3.9.1 to 3.15.2

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.9.1 to 3.15.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.9.1...3.15.2)

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

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

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ Django==1.11.28
 # Django Rest Framework
 certifi==2022.12.7
 chardet==3.0.4
-djangorestframework==3.9.1
+djangorestframework==3.15.2
 django-filter==1.1.0
 Markdown==2.6.11
 httpie==1.0.3