www/firefox-esr: update to 128.4.0 (rc1)

Release Notes (soon):
  https://www.mozilla.org/en-US/firefox/128.4.0/releasenotes/

www/firefox-esr/Makefile

 PORTNAME=	firefox
-DISTVERSION=	128.3.1
-PORTREVISION=	1
+DISTVERSION=	128.4.0
 PORTEPOCH=	1
 CATEGORIES=	www wayland
 MASTER_SITES=	MOZILLA/${PORTNAME}/releases/${DISTVERSION}esr/source \

www/firefox-esr/distinfo

-TIMESTAMP = 1728423594
-SHA256 (firefox-128.3.1esr.source.tar.xz) = c1f4052f3a88d96a122551d5025053304007f7649886d5e2fdfd1a11ce3d70a8
-SIZE (firefox-128.3.1esr.source.tar.xz) = 562947536
+TIMESTAMP = 1729574090
+SHA256 (firefox-128.4.0esr.source.tar.xz) = 074014e1c26144e10707b12a271176a4b6b67021e91444b613edae38d188febc
+SIZE (firefox-128.4.0esr.source.tar.xz) = 558619512