Fix ShaderBuild

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Lit/LitData.template

 struct FragInput
 {
-	float4 positionHS;
+	float4 unPositionSS;
 	float3 positionWS;
 	float2 meshUV0;
 	float2 meshUV1;

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Lit/LitShare.template

 	FragInput output;
 	ZERO_INITIALIZE(FragInput, output);
 
-	output.positionHS = input.positionHS;
+	output.unPositionSS = input.positionHS;
 	output.positionWS.xyz = input.interpolators[0].xyz;
 	output.tangentToWorld[0] = input.interpolators[1].xyz;
 	output.tangentToWorld[1] = input.interpolators[2].xyz;