Fix a typo (#34)

pages/06.data-sources/02.ajax/docs.md

@@ -74,7 +74,7 @@ $('#mySelect2').select2({
   ajax: {
     url: '/example/api',
     processResults: function (data) {
-      // Tranforms the top-level key of the response object from 'items' to 'results'
+      // Transforms the top-level key of the response object from 'items' to 'results'
       return {
         results: data.items
       };