Added description for initialization scene

UOP1_Project/Assets/ScriptableObjects/SceneData/Initialization.asset

   m_EditorClassIdentifier: 
   sceneAsset: {fileID: 102900000, guid: e8df4c5a458acc5489b2865e6b789224, type: 3}
   scenePath: Assets/Scenes/Initialization.unity
-  shortDescription: 
+  shortDescription: The scene from where the game starts and it is responsible for
+    loading PersistentManagers scene and raises the event to load the main menu.
   music: {fileID: 0}