f move payment secret to custom tlv

Author: valentinewallace

lightning/src/blinded_path/payment.rs

@@ -93,8 +93,8 @@ impl_writeable_tlv_based!(ForwardTlvs, {
 });
 
 impl_writeable_tlv_based!(ReceiveTlvs, {
-	(6, payment_secret, required),
 	(12, payment_constraints, required),
+	(65536, payment_secret, required),
 });
 
 impl<'a> Writeable for BlindedPaymentTlvsRef<'a> {