Bump django in /backend in the pip group across 1 directory (#468)

Bumps the pip group with 1 update in the /backend directory: [django](https://github.com/django/django).


Updates `django` from 6.0.6 to 6.0.7
- [Commits](django/django@6.0.6...6.0.7)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 6.0.7
  dependency-type: direct:production
  dependency-group: pip
...

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Author: dependabot[bot]

backend/Pipfile

@@ -15,7 +15,7 @@ coverage = "==7.14.3"
 defusedxml = "==0.7.1"
 dill = "==0.4.1"
 distlib = "==0.4.3"
-django = "==6.0.6"
+django = "==6.0.7"
 django-appconf = "==1.2.0"
 django-cors-headers = "==4.9.0"
 django-compressor = "==4.6.0"