build(deps): bump djangorestframework from 3.14.0 to 3.15.2

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.txt

@@ -20,7 +20,7 @@ Django==4.1.13
 django-ajax-datatable==4.4.4
 django-filter==22.1
 django-mysql==4.7.1
-djangorestframework==3.14.0
+djangorestframework==3.15.2
 docopt==0.6.2
 docutils==0.16
 enum-compat==0.0.3