Update django requirement from ~=4.1.7 to ~=4.2.1

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@4.1.7...4.2.1)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-Django~=4.1.7
+Django~=4.2.1
 beautifulsoup4~=4.11.2
 lxml~=4.9.2
 requests~=2.28.2