adds missing write on tryPutBeforeUpdating

LeStorage/StoredSingleton.swift

@@ -31,6 +31,7 @@ public class StoredSingleton<T: SyncedStorable>: SyncedCollection<T> {
         let result = try await StoreCenter.main.service().rawPut(instance)
         if let item = self.item() {
             item.copy(from: result)
+            self.addOrUpdate(instance: item)
         }
     }