www/webkit2-gtk3: fix build with clang 16

Clang 16 has a new error about integer values being outside the valid
range for enum types, which shows up when building www/webkit2-gtk3:

  /wrkdirs/usr/ports/www/webkit2-gtk3/work/webkitgtk-2.34.6/Source/WTF/wtf/URLHelpers.cpp:51:34: error: integer value 256 is outside the valid range of values [-256, 255] for this enumeration type [-Wenum-constexpr-conversion]
  constexpr auto scriptCodeLimit = static_cast<UScriptCode>(256);
                                   ^

Upstream fixed this in <https://commits.webkit.org/256560@main>, for
<https://bugs.webkit.org/show_bug.cgi?id=247770>, so apply that patch.
Thanks to Vladislav Shchapov for pointing out the upstream fix.

PR:		271827
Approved by:	portmgr (build blanket)
MFH:		2023Q2

www/webkit2-gtk3/Makefile

@@ -1,12 +1,15 @@
 PORTNAME=	webkit
 DISTVERSION=	2.34.6
-PORTREVISION=	6
+PORTREVISION=	7
 CATEGORIES=	www
 MASTER_SITES=	https://webkitgtk.org/releases/
 PKGNAMESUFFIX=	2-gtk3
 DISTNAME=	${PORTNAME}gtk-${PORTVERSION}
 DIST_SUBDIR=	gnome
 
+PATCH_SITES=	https://github.com/WebKit/WebKit/commit/
+PATCHFILES=	06f9978e52a8408ed6c2c8296afb1e7449c2f1ee.patch:-p1 # https://bugs.webkit.org/show_bug.cgi?id=247770
+
 MAINTAINER=	gnome@FreeBSD.org
 COMMENT=	Opensource browser engine using the GTK+ 3 toolkit
 WWW=		https://webkitgtk.org/

www/webkit2-gtk3/distinfo

@@ -1,3 +1,5 @@
-TIMESTAMP = 1646438253
+TIMESTAMP = 1685906637
 SHA256 (gnome/webkitgtk-2.34.6.tar.xz) = 6bc8fd034aad0432a2459ce4fc7ee25ad65a4924c618bf8d93b52b0c1a84c1f6
 SIZE (gnome/webkitgtk-2.34.6.tar.xz) = 24393340
+SHA256 (gnome/06f9978e52a8408ed6c2c8296afb1e7449c2f1ee.patch) = 780812ffdff6b970c0e270e4605ec15325840723e2733c475371e92a56d257da
+SIZE (gnome/06f9978e52a8408ed6c2c8296afb1e7449c2f1ee.patch) = 1661