chore(deps): update dependency django to v4.2.20 [security]

Author: renovate[bot]

requirements/base.txt

@@ -22,7 +22,7 @@ django-autoslug==1.9.9
 https://github.com/liqd/django-ckeditor-5/releases/download/v0.2.13-liqd/django_ckeditor_5-0.2.13-py3-none-any.whl
 django-filter==24.3
 django-widget-tweaks==1.5.0
-Django==4.2.16
+Django==4.2.20
 djangorestframework==3.15.2
 easy-thumbnails[svg]==2.10
 python-dateutil==2.9.0.post0