Bump django from 4.1.8 to 4.2.1

Bumps [django](https://github.com/django/django) from 4.1.8 to 4.2.1.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@4.1.8...4.2.1)

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

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

requirements/base.txt

@@ -12,7 +12,7 @@ hupper
 
 # Django
 # ------------------------------------------------------------------------------
-django==4.1.8  # pyup: < 4.2  # https://www.djangoproject.com/
+django==4.2.1  # pyup: < 4.2  # https://www.djangoproject.com/
 django-environ==0.10.0  # https://github.com/joke2k/django-environ
 django-model-utils==4.3.1  # https://github.com/jazzband/django-model-utils
 django-redis==5.2.0  # https://github.com/jazzband/django-redis