Bump django from 5.2.3 to 5.2.6 in /requirements

Bumps [django](https://github.com/django/django) from 5.2.3 to 5.2.6.
- [Commits](django/django@5.2.3...5.2.6)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 5.2.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -1,4 +1,4 @@
-Django==5.2.3
+Django==5.2.6
 django-environ==0.12.0
 psycopg2==2.9.10
 djangorestframework==3.16.0