chore(deps): bump django from 4.2.7 to 5.0.2 in /backend/requirements

Bumps [django](https://github.com/django/django) from 4.2.7 to 5.0.2.
- [Commits](django/django@4.2.7...5.0.2)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

backend/requirements/base.txt

@@ -11,7 +11,7 @@ flower==2.0.1  # https://github.com/mher/flower
 
 # Django
 # ------------------------------------------------------------------------------
-django==4.2.7 # https://www.djangoproject.com/
+django==5.0.2 # https://www.djangoproject.com/
 djangorestframework-simplejwt==5.3.1 # https://github.com/jazzband/djangorestframework-simplejwt
 django-health-check==3.17.0 # https://github.com/revsys/django-health-check
 django-environ==0.11.2 # https://github.com/joke2k/django-environ