*: Switch consumers over to Django 4.2

Django 3.2 reached its End-of-Life on 1st April 2024 and Django 4.2 is
the new LTS (= Long Term Support) release which will be supported until
April 2026.

* Switch most ports that use www/py-django32 to www/py-django42.

* Ports that are not compatible with Django 3.2 have already been set
  with an expiration date were not taken into account.

* Bump PORTREVISION due dependency change where necessary.

PR:		276319
Reviewed by:	dvl, grembo, ultima
Approved by:	bofh (implicit), dvl, grembo, Kevin Golding, sunpoet,
		ultima, maintainer timeout (remaining maintainers)
Differential Revision:	https://reviews.freebsd.org/D44637