Material update for the Scene Understanding example

Author: cre8ivepark

Assets/MRTK/Examples/Experimental/SceneUnderstanding/Materials/DemoSceneUnderstanding.mat

@@ -49,7 +49,7 @@ Material:
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     - _MainTex:
-        m_Texture: {fileID: 2800000, guid: 2acb9155180fecf4087cca3961edb28f, type: 3}
+        m_Texture: {fileID: 2800000, guid: 3cce4c9cab2b82b47b11e5a2fb0e642f, type: 3}
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     - _MetallicGlossMap: