Fix to typo

prs.desktop/Panels/Reservation Management/Substitution/ReservationManagementSubstitutionWindow.xaml.cs

@@ -34,7 +34,7 @@ public partial class ReservationManagementSubstitutionWindow : Window
         var _holding = substitutions.SelectedRows?.FirstOrDefault()?.ToObject<StockHolding>();
         if (_holding == null || substitutions.JRI == null)
             return;
-        Progress.ShowModal("Subsitution Item", progress =>
+        Progress.ShowModal("Substitution Item", progress =>
         {
             substitutions.JRI.Dimensions.CopyFrom(_holding.Dimensions, true);
             if (substitutions.UpdateStyle)