Update article.md

Sensible re-ordering of words.

Author: dhx-mike-palandra

1-js/05-data-types/11-json/article.md

@@ -66,7 +66,7 @@ alert(json);
 
 The method `JSON.stringify(student)` takes the object and converts it into a string.
 
-The resulting `json` string is a called *JSON-encoded* or *serialized* or *stringified* or *marshalled* object. We are ready to send it over the wire or put into a plain data store.
+The resulting `json` string is called a *JSON-encoded* or *serialized* or *stringified* or *marshalled* object. We are ready to send it over the wire or put into a plain data store.
 
 
 Please note that a JSON-encoded object has several important differences from the object literal: