Bump django from 2.2.28 to 4.2.15

Bumps [django](https://github.com/django/django) from 2.2.28 to 4.2.15.
- [Commits](django/django@2.2.28...4.2.15)

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

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

Author: dependabot[bot]

base-requirements.txt

@@ -4,7 +4,7 @@ django-sitetree==1.18.0
 django-apptemplates==1.5
 django-admin-interface==0.24.2
 django-translation-aliases==0.1.0
-Django==2.2.28
+Django==4.2.15
 docutils==0.12
 Markdown==3.3.4
 cmarkgfm==0.6.0