[tests] Correct docstring for address.py

Author: jnewbery

test/functional/test_framework/address.py

@@ -2,7 +2,10 @@
 # Copyright (c) 2016-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-"""Encode and decode BASE58, P2PKH and P2SH addresses."""
+"""Encode and decode Bitcoin addresses.
+
+- base58 P2PKH and P2SH addresses.
+- bech32 segwit v0 P2WPKH and P2WSH addresses."""
 
 import enum
 import unittest