print script by base64 (neo-project#2005)

Co-authored-by: Tommo-L <[email protected]>

src/neo/Wallets/Wallet.cs

@@ -350,7 +350,7 @@ private Transaction MakeTransaction(StoreView snapshot, byte[] script, Signer[]
                 {
                     if (engine.State == VMState.FAULT)
                     {
-                        throw new InvalidOperationException($"Failed execution for '{script.ToHexString()}'", engine.FaultException);
+                        throw new InvalidOperationException($"Failed execution for '{Convert.ToBase64String(script)}'", engine.FaultException);
                     }
                     tx.SystemFee = engine.GasConsumed;
                 }