Update include/SDL3/SDL_gpu.h

Co-authored-by: Ethan Lee <flibitijibibo@gmail.com>

Author: slouken

Diff for: include/SDL3/SDL_gpu.h

@@ -2375,7 +2375,7 @@ extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetGPUDeviceDebugProperties(
 #define SDL_PROP_GPU_DEVICE_DEBUG_DRIVER_NAME_STRING        "SDL.gpu.device.debug.driver_name"
 #define SDL_PROP_GPU_DEVICE_DEBUG_DRIVER_VERSION_STRING     "SDL.gpu.device.debug.driver_version"
 #define SDL_PROP_GPU_DEVICE_DEBUG_DRIVER_INFO_STRING        "SDL.gpu.device.debug.driver_info"
-#define SDL_PROP_GPU_DEVICE_DEBUG_VULKAN_CONFORMANCE_STRING "SDL.gpu.device.debug.vulkan_conformance"
+#define SDL_PROP_GPU_DEVICE_DEBUG_VULKAN_CONFORMANCE_STRING "SDL.gpu.device.debug.vulkan.conformance"
 
 /* State Creation */