Bump django from 2.2.28 to 4.2.16

Bumps [django](https://github.com/django/django) from 2.2.28 to 4.2.16.
- [Commits](django/django@2.2.28...4.2.16)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-Django==2.2.28
+Django==4.2.16
 django-extensions==3.1.5
 sorl-thumbnail==12.7.0
 django-gravatar2==1.4.0