Bump django from 4.2.16 to 4.2.17 in /demo

Bumps [django](https://github.com/django/django) from 4.2.16 to 4.2.17.
- [Commits](django/django@4.2.16...4.2.17)

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

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

demo/requirements.txt

@@ -1,2 +1,2 @@
-Django==4.2.16
+Django==4.2.17
 django-sitetree==1.14