Bump django from 3.2.25 to 4.2.18 in /requirements

Bumps [django](https://github.com/django/django) from 3.2.25 to 4.2.18.
- [Commits](django/django@3.2.25...4.2.18)

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

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

Author: dependabot[bot]

requirements/docs.txt

@@ -7,7 +7,7 @@ m2r
 sphinx-notfound-page
 
 # for extracting model docs
-django==3.2.25
+django==4.2.18
 djangorestframework==3.14.0
 django-mptt==0.16.0
 rsa==3.4.2