Bump django in /examples/demo_project/master_service

Bumps [django](https://github.com/django/django) from 3.2.13 to 3.2.16.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.2.13...3.2.16)

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

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

examples/demo_project/master_service/requirements.txt

@@ -1,4 +1,4 @@
-django==3.2.13
+django==3.2.16
 psycopg2==2.9.1
 djangorestframework==3.12.4
 django-cqrs