multimedia/libzen: Update to 23.06

Changes:	https://github.com/MediaArea/ZenLib/blob/master/History.txt

multimedia/libzen/Makefile

 PORTNAME=	libzen
-PORTVERSION=	23.04
+PORTVERSION=	23.06
 PORTEPOCH=	1
 CATEGORIES=	multimedia
 MASTER_SITES=	https://mediaarea.net/download/binary/mediainfo/${PORTVERSION}/ \

multimedia/libzen/distinfo

-TIMESTAMP = 1682616630
-SHA256 (MediaInfo_CLI_23.04_GNU_FromSource.tar.xz) = 933d17f66745091b284141e028ba71064acf1a2fafecb0a587ad78e56a3453fc
-SIZE (MediaInfo_CLI_23.04_GNU_FromSource.tar.xz) = 3383988
+TIMESTAMP = 1688166072
+SHA256 (MediaInfo_CLI_23.06_GNU_FromSource.tar.xz) = ca19d65f9d4830920101e97ebadcfbe511058722e29db3ca52f828442dc14cdd
+SIZE (MediaInfo_CLI_23.06_GNU_FromSource.tar.xz) = 3406856