[Roots] Update taxonomy example

Fixes #1384

example/taxonomy/bundle.js

@@ -35,6 +35,11 @@ define([
         "description": "Example illustrating the addition of a static top-level hierarchy",
         "extensions": {
             "roots": [
+                {
+                    "id": "exampleTaxonomy"
+                }
+            ],
+            "models": [
                 {
                     "id": "exampleTaxonomy",
                     "model": {