Add config note

Deliveroo/Configuration.cs

@@ -12,6 +12,12 @@ internal sealed class Configuration : IPluginConfiguration
     public List<PurchasePriority> ItemsToPurchase { get; set; } = new();
 
     public int ReservedSealCount { get; set; } = 0;
+
+    /// <summary>
+    /// A config-only setting, not exposed in the UI.
+    ///
+    /// If set, buys all GC items in their max quantity (otherwise, everything except ventures is capped to 99).
+    /// </summary>
     public bool IgnoreCertainLimitations { get; set; } = false;
 
     internal sealed class PurchasePriority