devel/llvm16: update to 16.0.0rc2

Sponsored by:	DARPA

devel/llvm16/Makefile

 PORTNAME=	llvm
-DISTVERSION=	16.0.0rc1
+DISTVERSION=	16.0.0rc2
 PORTREVISION=	0
 CATEGORIES=	devel lang
 MASTER_SITES=	https://github.com/llvm/llvm-project/releases/download/llvmorg-${DISTVERSION:S/rc/-rc/}/ \

devel/llvm16/distinfo

-TIMESTAMP = 1675097540
-SHA256 (llvm-project-16.0.0rc1.src.tar.xz) = 8399db003b223ce33e3d7a5ee9df8dc3574cedffa5d9be4783660643f8402900
-SIZE (llvm-project-16.0.0rc1.src.tar.xz) = 118364920
+TIMESTAMP = 1675875093
+SHA256 (llvm-project-16.0.0rc2.src.tar.xz) = 2ae53e4d9cdc46e660359a5311f276bd4cb39c310345de951c580a09b4f34861
+SIZE (llvm-project-16.0.0rc2.src.tar.xz) = 117917640