readme: update dep graph visualization

Author: paulirish

readme.md

@@ -96,7 +96,7 @@ _Some incomplete notes_
 * **Aggregators** - Pulling audit results, grouping into user-facing components (eg. `install_to_homescreen`) and applying weighting and overall scoring.
 
 ##### Internal module graph
-![graph of lighthouse-core module dependencies](https://cloud.githubusercontent.com/assets/39191/16317303/54a25e20-3982-11e6-9374-dd3c24b70468.png)
+![graph of lighthouse-core module dependencies](https://cloud.githubusercontent.com/assets/39191/16702446/cd59989e-451a-11e6-97e9-6c72c301017d.png)
 <small><code>npm install -g js-vd; vd --exclude "node_modules|third_party" lighthouse-core/ > graph.html</code></small>