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-type: direct:production
...

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

requirements/base.txt

@@ -19,7 +19,7 @@ coreapi==2.3.3
 coreschema==0.0.4
 cryptography==43.0.1
 django==4.1.13
-djangorestframework==3.14.0
+djangorestframework==3.15.2
 drf-yasg[validation]==1.21.4
 exceptiongroup==1.0.4
 idna==3.4