Bump djangorestframework from 3.14.0 to 3.15.2 in /requirements

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.14.0 to 3.15.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.14.0...3.15.2)

---
updated-dependencies:
- dependency-name: djangorestframework
  dependency-version: 3.15.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/base.txt

@@ -20,7 +20,7 @@ six==1.15.0
 urllib3==1.26.6
 whitenoise==6.1.0
 psycopg2-binary==2.9.10
-djangorestframework==3.14.0
+djangorestframework==3.15.2
 django-htmx==1.15.0
 gevent==22.10.2  # Updated version of gevent
 greenlet==3.0.3  # Updated version of greenlet