Fixed ifdef

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/DeferredDirectionalShadow.compute

 	ShadowContext shadowContext = InitShadowContext();
 	float shadow = GetDirectionalShadowAttenuation(shadowContext, posInput.positionWS, float3(0.0, 0.0, 0.0), (uint)_DirectionalShadowIndex, float3(0.0, 0.0, 0.0));
 
-#if ENABLE_CONTACT_SHADOWS
+#ifdef ENABLE_CONTACT_SHADOWS
 	float contactShadow = 1.0f;
 	if (_ContactShadowLength > 0.0f)
 	{