Fix typo

Author: zander

bip-0134.mediawiki

@@ -195,7 +195,7 @@ calculation of the merkle tree.  This means that changes in signatures
 would not be detectable and open an attack vector.
 
 For this reason the merkle tree is extended to include (append) the hash of
-the v4 transactions. The markle tree will continue to have all the
+the v4 transactions. The merkle tree will continue to have all the
 transactions' tx-ids but appended to that are the v4 hashes that include the
 signatures as well.  Specifically the hash is taken over a data-blob that
 is built up from: