www/py-django-constance: Update 4.3.4 to 4.3.5

• Assume maintainership.

• Switch to the more preferred DISTVERSION.

Changelog:

https://github.com/jazzband/django-constance/releases/tag/4.3.5

PR: 297821
Reported by: Christos Longros
Co-authored-by: Kai Knoblich <kai@FreeBSD.org>