docs: fix typo in changes

Author: dougwilson

Changes.md

@@ -7,7 +7,7 @@ you spot any mistakes.
 ## HEAD
 
 * Fix `connection.threadId` missing on handshake failure
-* Fix duplicte packet name in debug output
+* Fix duplicate packet name in debug output
 * Fix no password support for old password protocol
 * Remove special case for handshake in determine packet code
 * Small performance improvement starting command sequence