Fix collection modified error when locking storage (#27913)

Content.Shared/Storage/EntitySystems/SharedStorageSystem.cs

@@ -1415,11 +1415,11 @@ public abstract class SharedStorageSystem : EntitySystem
             return;
 
         // Gets everyone looking at the UI
-        foreach (var actor in _ui.GetActors(uid, StorageComponent.StorageUiKey.Key))
+        foreach (var actor in _ui.GetActors(uid, StorageComponent.StorageUiKey.Key).ToList())
         {
             if (_admin.HasAdminFlag(actor, AdminFlags.Admin))
                 continue;
-                
+
             // And closes it unless they're an admin
             _ui.CloseUi(uid, StorageComponent.StorageUiKey.Key, actor);
         }