docs: Fix broken link in LoaderAndLayerInterface
docs: Fix broken link in LoaderAndLayerInterface

The Manifest file example link was broken.

Change-Id: I454392f14f526ef6fdf5b30d971bd06739acb994

elongbug/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,elongbug/Vulkan-LoaderAndValidationLayers,elongbug/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,elongbug/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers