build(deps): bump djangorestframework from 3.12.2 to 3.15.2

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.12.2 to 3.15.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.12.2...3.15.2)

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

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

requirements.txt

@@ -12,7 +12,7 @@ cssselect==1.1.0
 Django==3.2.12
 django-admin-autocomplete-filter==0.7.1
 django-filter==21.1
-djangorestframework==3.12.2
+djangorestframework==3.15.2
 happybase==1.2.0
 hyperlink==20.0.1
 idna==2.10