net/chrony: update to 4.6

ChangeLog:	https://chrony-project.org/news.html#_2_sep_2024_chrony_4_6_released

net/chrony/Makefile

 PORTNAME=	chrony
-DISTVERSION=	4.5
-PORTREVISION=	1
+DISTVERSION=	4.6
 CATEGORIES=	net
 MASTER_SITES=	https://chrony-project.org/releases/ \
 		LOCAL/mandree

net/chrony/distinfo

-TIMESTAMP = 1701797984
-SHA256 (chrony-4.5.tar.gz) = 19fe1d9f4664d445a69a96c71e8fdb60bcd8df24c73d1386e02287f7366ad422
-SIZE (chrony-4.5.tar.gz) = 620287
+TIMESTAMP = 1725310571
+SHA256 (chrony-4.6.tar.gz) = 9adad4a5014420fc52b695896556fdfb49709dc7cd72d7f688d9eb85d5a274d5
+SIZE (chrony-4.6.tar.gz) = 631899