Comment spelling fix.

Author: pmcnr-hx

lib/mongoHandler.js

@@ -54,7 +54,7 @@ MongoStore.prototype._getSearchCriteria = function(request) {
 
   var criteria = Object.keys(request.params.filter).map(function(attribute) {
     var attributeConfig = self.resourceConfig.attributes[attribute];
-    // If the filter attribute doens't exist, skip it
+    // If the filter attribute doesn't exist, skip it
     if (!attributeConfig) return null;
 
     var values = request.params.filter[attribute];