Fix Normal Strength node

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Artistic/Normal/NormalStrengthNode.cs

             return
                 @"
 {
-    Out = {precision}3(In.rg * Strength, 1);
+    Out = {precision}3(In.rg * Strength, In.b);
 }
 ";
         }