docs(import): update DefaultSleeveId comment after removing deck cloning

SVSim.EmulatedEntrypoint/Controllers/AdminController.cs

@@ -283,8 +283,8 @@ public class AdminController : SVSimController
     }
 
     /// <summary>
-    /// Default sleeve id used for cloned starter decks. Matches prod's wire shape — every
-    /// default_deck_list entry on /deck/info has <c>sleeve_id: 3000011</c>.
+    /// Fallback sleeve id used when an imported deck has no resolvable <c>sleeve_id</c>.
+    /// 3000011 is prod's default deck sleeve.
     /// </summary>
     private const long DefaultSleeveId = 3000011L;
 }