enabled gpu instancing on sample material

Author: sleal-unity

com.unity.perception/Samples~/Tutorial Files/Background Objects/Materials/prototyping_texture_alignment_01.mat

@@ -9,9 +9,9 @@ Material:
   m_PrefabAsset: {fileID: 0}
   m_Name: prototyping_texture_alignment_01
   m_Shader: {fileID: -6465566751694194690, guid: 90ad3a47f8ccd406eab0fbf0c7a64d88, type: 3}
-  m_ShaderKeywords: 
+  m_ShaderKeywords:
   m_LightmapFlags: 4
-  m_EnableInstancingVariants: 0
+  m_EnableInstancingVariants: 1
   m_DoubleSidedGI: 0
   m_CustomRenderQueue: -1
   stringTagMap: {}
@@ -93,6 +93,6 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: d0353a89b1f911e48b9e16bdc9f2e058, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
+  m_Name:
+  m_EditorClassIdentifier:
   version: 1