www/py-django42: Update to 4.2.16

www/py-django42/Makefile

 PORTNAME=	django
-PORTVERSION=	4.2.15
+PORTVERSION=	4.2.16
 CATEGORIES=	www python
 MASTER_SITES=	PYPI \
 		https://media.djangoproject.com/releases/${PORTVERSION:R}/

www/py-django42/distinfo

-TIMESTAMP = 1722984919
-SHA256 (python/Django-4.2.15.tar.gz) = c77f926b81129493961e19c0e02188f8d07c112a1162df69bfab178ae447f94a
-SIZE (python/Django-4.2.15.tar.gz) = 10418066
+TIMESTAMP = 1725453335
+SHA256 (python/Django-4.2.16.tar.gz) = 6f1616c2786c408ce86ab7e10f792b8f15742f7b7b7460243929cb371e7f1dad
+SIZE (python/Django-4.2.16.tar.gz) = 10436023