chore(deps): bump django from 5.2.8 to 5.2.12 in /server

Bumps [django](https://github.com/django/django) from 5.2.8 to 5.2.12.
- [Commits](django/django@5.2.8...5.2.12)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 5.2.12
  dependency-type: direct:production
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -1,4 +1,4 @@
-django==5.2.8
+django==5.2.12
 
 djangorestframework==3.16.1
 django-filter==25.2