Bump django from 5.1.2 to 5.1.3 in /requirements

Bumps [django](https://github.com/django/django) from 5.1.2 to 5.1.3.
- [Commits](django/django@5.1.2...5.1.3)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/base.txt

@@ -1,4 +1,4 @@
-Django==5.1.2
+Django==5.1.3
 -e git+https://github.com/jazzband/django-user-sessions.git#egg=django-user-sessions
 Pillow==11.0.0
 oauth2client==4.1.3