Fix typo in comment

Author: cuongvng

contrib/verifybinaries/verify.py

@@ -2,7 +2,7 @@
 # Copyright (c) 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.
-"""Script for verifying Bitoin Core release binaries
+"""Script for verifying Bitcoin Core release binaries
 
 This script attempts to download the signature file SHA256SUMS.asc from
 bitcoincore.org and bitcoin.org and compares them.