Merge branch 'renovate/django-ckeditor-6.x' into 'master'

Update dependency django-ckeditor to v6

See merge request AlekSIS/official/AlekSIS!360

pyproject.toml

@@ -63,7 +63,7 @@ django_widget_tweaks = "^1.4.5"
 django-filter = "^2.2.0"
 django-templated-email = "^2.3.0"
 html2text = "^2020.0.0"
-django-ckeditor = "^5.8.0"
+django-ckeditor = "^6.0.0"
 django-js-reverse = "^0.9.1"
 calendarweek = "^0.4.3"
 Celery = {version="^4.4.0", optional=true, extras=["django", "redis"]}