Update BC-UR bundle and support decoding hex format of wallet (#2505)

BTCPayServer/DerivationSchemeSettings.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text;
 using BTCPayServer.Payments;
 using NBitcoin;
 using NBitcoin.DataEncoders;
@@ -98,6 +99,10 @@ namespace BTCPayServer
             JObject jobj = null;
             try
             {
+                if (HexEncoder.IsWellFormed(fileContents))
+                {
+                    fileContents = Encoding.UTF8.GetString(Encoders.Hex.DecodeData(fileContents));
+                }
                 jobj = JObject.Parse(fileContents);
             }
             catch