Fix spelling mistake in ajaxify HTML property comment

Author: nhunzaker

src/renderers/dom/shared/HTMLDOMPropertyConfig.js

@@ -66,7 +66,7 @@ var HTMLDOMPropertyConfig = {
  // See http://schema.org/docs/gs.html
  itemScope: HAS_BOOLEAN_VALUE,
  // Facebook internal attribute. This is an object attribute that
- // impliments a custom toString() method. Objects are not allowed as
+ // implements a custom toString() method. Objects are not allowed as
  // custom attributes unless they are specified by an attribute config
  ajaxify: 0,
  // These attributes must stay in the white-list because they have