save stop whining flag

MareSynchronos/UI/SettingsUi.cs

@@ -611,6 +611,7 @@ public class SettingsUi : WindowMediatorSubscriberBase
         if (ImGui.Checkbox("Do not notify for modified game files or enabled LOD", ref stopWhining))
         {
             _configService.Current.DebugStopWhining = stopWhining;
+            _configService.Save();
         }
         _uiShared.DrawHelpText("Having modified game files will still mark your logs with UNSUPPORTED and you will not receive support, message shown or not." + UiSharedService.TooltipSeparator
             + "Keeping LOD enabled can lead to more crashes. Use at your own risk.");