Fix changelog typo [ci skip]

Closes #283

Author: carlosantoniodasilva

CHANGELOG.md

@@ -25,7 +25,7 @@
 - update jquery to 3.3.0
 - Add possibility to test HTML: all, attribute prefix, attribute contains,
   attribute ends with, child, and class selectors
-- Fix matching mutiple calls for the same selector/function exception
+- Fix matching multiple calls for the same selector/function exception
 
 ## 4.3.1