Fix hotwallet migration

BTCPayServer/Hosting/MigrationStartupTask.cs

@@ -151,6 +151,7 @@ namespace BTCPayServer.Hosting
                 {
                     paymentMethod.IsHotWallet = paymentMethod.Source == "NBXplorer";
                     paymentMethod.Source = "NBXplorerGenerated";
+                    store.SetSupportedPaymentMethod(paymentMethod);
                 }
             }
             await ctx.SaveChangesAsync();

BTCPayServer/Services/MigrationSettings.cs

@@ -1,7 +1,10 @@
+using Newtonsoft.Json;
+
 namespace BTCPayServer.Services
 {
     public class MigrationSettings
     {
+        [JsonProperty("MigrateHotwalletProperty2")]
         public bool MigrateHotwalletProperty { get; set; }
         public bool MigrateU2FToFIDO2{ get; set; }
         public bool UnreachableStoreCheck { get; set; }