vulkaninfo: fix forgotten </details> tag
vulkaninfo: fix forgotten </details> tag

Fixes incorrect html output from a forgotten html closing tag.

Change-Id: I3e731dafc0b191dfaa71426a7a88b6ccd28477c2

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools