Bump django from 2.2.18 to 3.2.24 in /example

Bumps [django](https://github.com/django/django) from 2.2.18 to 3.2.24.
- [Commits](django/django@2.2.18...3.2.24)

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

Signed-off-by: dependabot[bot] <[email protected]>

example/requirements.txt

@@ -1,4 +1,4 @@
-django==2.2.18
+django==3.2.24
 celery
 
 pytest