Add a comment addressing invalid address

Author: Camillarhi

tests/integration_tests_rust.rs

@@ -34,7 +34,6 @@ use bitcoin::address::NetworkUnchecked;
 use bitcoin::hashes::Hash;
 use bitcoin::Address;
 use bitcoin::Amount;
-use lightning_invoice::{Bolt11InvoiceDescription, Description};
 use log::LevelFilter;
 
 use std::str::FromStr;
@@ -305,6 +304,7 @@ fn onchain_send_receive() {
 
 	let addr_a = node_a.onchain_payment().new_address().unwrap();
 	let addr_b = node_b.onchain_payment().new_address().unwrap();
+	// This is a Bitcoin Testnet address. Sending funds to this address from the Regtest network will fail 
 	let static_address = "tb1q0d40e5rta4fty63z64gztf8c3v20cvet6v2jdh";
 	let unchecked_address = Address::<NetworkUnchecked>::from_str(static_address).unwrap();
 	let addr_c = unchecked_address.assume_checked();