Bump django in /examples/demo_project/replica_service

Bumps [django](https://github.com/django/django) from 3.2.14 to 3.2.15.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.2.14...3.2.15)

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

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

examples/demo_project/replica_service/requirements.txt

@@ -1,4 +1,4 @@
-django==3.2.14
+django==3.2.15
 djangorestframework==3.12.4
 mysqlclient
 django-redis