Bump django from 4.0.6 to 4.0.9 in /server

Bumps [django](https://github.com/django/django) from 4.0.6 to 4.0.9.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@4.0.6...4.0.9)

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

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

Author: dependabot[bot]