re-fixed icon reference for mute overlay icon

Assets/Prefabs/UI/UserCardPanel.prefab

   m_OnCullStateChanged:
     m_PersistentCalls:
       m_Calls: []
-  m_Sprite: {fileID: 21300000, guid: 53f4a85bd14eb434cbd71255347af344, type: 3}
+  m_Sprite: {fileID: 21300000, guid: bf5910b0ba2403a448a96cb6f77b611c, type: 3}
   m_Type: 0
   m_PreserveAspect: 0
   m_FillCenter: 1