${FFX_HOST_PATH}/fsr3 folder does not exist

[ohmaya]

https://github.com/GPUOpen-LibrariesAndSDKs/FidelityFX-SDK/blob/release-FSR3-3.0.3/sdk/src/components/fsr3/CMakeLists.txt#L34

	file(GLOB PUBLIC_SOURCES
		"${FFX_HOST_PATH}/fsr3/*.h"
		"${FFX_HOST_PATH}/fsr3/*.cpp")
	list(APPEND PUBLIC_SOURCES ${FFX_PUBLIC_SOURCES})

The only fsr3-related (not fsr3upscaler) file in sdk\include\FidelityFX\host is ffx_fsr3.h, which could need to be included in public_source.