graphics/vulkan-headers: update to 1.2.199

Force rebuild vulkan-loader to make sure vulkaninfo shows the new version.

Changes:	https://github.com/KhronosGroup/Vulkan-Headers/compare/v1.2.198...v1.2.199
Reported by:	Repology

graphics/vulkan-headers/Makefile

 PORTNAME=	vulkan-headers
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.2.198
+DISTVERSION=	1.2.199
 CATEGORIES=	graphics
 
 MAINTAINER=	jbeich@FreeBSD.org

graphics/vulkan-headers/distinfo

-TIMESTAMP = 1636446623
-SHA256 (KhronosGroup-Vulkan-Headers-v1.2.198_GH0.tar.gz) = 0b2c69bc392a0022652f65efe5c51ec39ae90ec427065a914ba74ac6c728db30
-SIZE (KhronosGroup-Vulkan-Headers-v1.2.198_GH0.tar.gz) = 1288016
+TIMESTAMP = 1637073531
+SHA256 (KhronosGroup-Vulkan-Headers-v1.2.199_GH0.tar.gz) = c4b860e267312364aa0b36e457e5ac8c114fe0957f216668c9da9211ef4643d0
+SIZE (KhronosGroup-Vulkan-Headers-v1.2.199_GH0.tar.gz) = 1298572

graphics/vulkan-loader/Makefile

 PORTNAME=	vulkan-loader
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.2.198
+PORTREVISION=	1
 CATEGORIES=	graphics devel
 
 MAINTAINER=	jbeich@FreeBSD.org