feat: update updated date of memo when if there are changes

Memola/App/MemolaApp.swift

@@ -14,6 +14,9 @@ struct MemolaApp: App {
             MemosView()
                 .persistence(\.viewContext)
                 .onReceive(NotificationCenter.default.publisher(for: UIApplication.willTerminateNotification)) { _ in
+                    withPersistenceSync(\.viewContext) { context in
+                        try context.saveIfNeeded()
+                    }
                     withPersistenceSync(\.backgroundContext) { context in
                         try context.saveIfNeeded()
                     }