Bump django from 5.2.9 to 5.2.11 in /backend

Bumps [django](https://github.com/django/django) from 5.2.9 to 5.2.11.
- [Commits](django/django@5.2.9...5.2.11)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 5.2.11
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/requirements.txt

@@ -17,7 +17,7 @@ click==8.1.7
 cryptography==44.0.1
 decorator==5.2.1
 dill==0.3.9
-Django==5.2.9
+Django==5.2.11
 django-netfields==1.3.2
 dnspython==2.7.0
 dnstwist==20230918