www/py-django-tagging: Add Django 3.2 compatibility

* Add a patch to incorporate an upstream pull-request [1] to address the
  Django 2.2 deprecation [2] and set dependency to Django 3.2.

PR:		263216, 261313 [2]
Obtained from:	[1] https://github.com/Fantomas42/django-tagging/pull/23/