Fix typo in BIP 49

Author: n1rna

bip-0049.mediawiki

@@ -26,7 +26,7 @@ will detect the accounts and handle them appropriately.
 ===Considerations===
 Two generally different approaches are possible for current BIP44 capable wallets:
 
-1) Allow the user to use the same account(s) that they already uses, but add segregated witness encoded addresses to it.
+1) Allow the user to use the same account(s) that they already use, but add segregated witness encoded addresses to it.
 
 1.1) Use the same public keys as defined in BIP44, but in addition to the normal P2PKH address also derive the P2SH address from it.