⬆️ Bump django from 4.2.7 to 5.0 in /shifter

Bumps [django](https://github.com/django/django) from 4.2.7 to 5.0.
- [Commits](django/django@4.2.7...5.0)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

shifter/requirements.txt

@@ -1,5 +1,5 @@
 asgiref==3.7.2
-Django==4.2.7
+Django==5.0
 django-crontab==0.7.1
 gunicorn==21.2.0
 psycopg==3.1.13