Update for force encoding

MedusaPluginChargeMachine/ChargeMachinePlugin.cs

@@ -2,6 +2,7 @@
 using MedusaPluginChargeMachine.Services;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
+using System.Text;
 
 namespace MedusaPluginChargeMachine;
 
@@ -18,6 +19,7 @@ public class ChargeMachinePlugin: IMedusaPlugin
     public string GameCode => "LA9";
     public int? MinVer => null;
     public int? MaxVer => null;
+    public Encoding? ForcedEncoding => null;
 
     public Task OnBuilderInitialize(WebApplicationBuilder builder)
     {