chore(deps): bump django from 5.2.11 to 5.2.12 in /backend (baserow#4915)

Bumps [django](https://github.com/django/django) from 5.2.11 to 5.2.12.
- [Commits](django/django@5.2.11...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -15,7 +15,7 @@ dynamic = ["version"]
 classifiers = []
 
 dependencies = [
-    "django==5.2.11",
+    "django==5.2.12",
     "django-cors-headers==4.9.0",
     "djangorestframework==3.16.1",
     "djangorestframework-simplejwt==5.5.1",