net/sofia-sip: update to 1.13.15

Changes:	https://github.com/freeswitch/sofia-sip/compare/v1.13.14...v1.13.15

PR:		271741
Approved by:	Dustin Marquess (maintainer)

net/sofia-sip/Makefile

 PORTNAME=	sofia-sip
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.13.14
+DISTVERSION=	1.13.15
 CATEGORIES=	net
 
 MAINTAINER=	jailbird@fdf.net

net/sofia-sip/distinfo

-TIMESTAMP = 1676912100
-SHA256 (freeswitch-sofia-sip-v1.13.14_GH0.tar.gz) = a517e31c6a406af3d7ec8cb0154e46ad12fbcb54dadfc3deada5d97bdbd9cc5a
-SIZE (freeswitch-sofia-sip-v1.13.14_GH0.tar.gz) = 2553894
+TIMESTAMP = 1683930660
+SHA256 (freeswitch-sofia-sip-v1.13.15_GH0.tar.gz) = 846b3d5eef57702e8d18967070b538030252116af1500f4baa78ad068c5fdd64
+SIZE (freeswitch-sofia-sip-v1.13.15_GH0.tar.gz) = 2553788