Bump django from 4.2.20 to 4.2.21

Bumps [django](https://github.com/django/django) from 4.2.20 to 4.2.21.
- [Commits](django/django@4.2.20...4.2.21)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 4.2.21
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -11,7 +11,7 @@ constantly==23.10.4
 coverage==7.6.1
 cryptography==44.0.2
 daphne==4.1.2
-Django==4.2.20
+Django==4.2.21
 django-filter==24.3
 django-widget-tweaks==1.5.0
 hyperlink==21.0.0