Update concept_insights.v2.js

fix for #102. missing `graphs ` in `annotateText` call

Author: germanattanasio

examples/concept_insights.v2.js

@@ -14,11 +14,11 @@ var params = {
 };
 
 // Retrieve the concepts for input text
-concept_insights.annotateText(params, function(err, res) {
+concept_insights.graphs.annotateText(params, function(err, res) {
   if (err)
     console.log(err);
   else {
     console.log('Annotated Text');
     console.log(JSON.stringify(res, null, 2));
   }
-});
+});