Bugfix: IsGammaSpace is undefined in HD Unlit

com.unity.shadergraph/Editor/Templates/HDUnlitPassForward.template

     #include "HDRP/ShaderVariables.hlsl"
     #include "HDRP/ShaderPass/FragInputs.hlsl"
     #include "HDRP/ShaderPass/ShaderPass.cs.hlsl"
+    #include "ShaderGraphLibrary/Functions.hlsl"
 
     ${Defines}