build(deps): bump djangorestframework in /cfl_common

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.13.1 to 3.15.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.13.1...3.15.2)

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

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

cfl_common/setup.py

@@ -18,7 +18,7 @@
     include_package_data=True,
     install_requires=[
         "django==3.2.25",
-        "djangorestframework==3.13.1",
+        "djangorestframework==3.15.2",
         "django-two-factor-auth==1.13.2",
         "django-countries==7.3.1",
         "pyjwt==2.6.0",