fix dead link to plotly docs

imatlab-helper · web-flow · commit ad49e3154988 · 2017-04-09T15:33:59.000-07:00
The original link with all caps does not work.
diff --git a/README.md b/README.md
@@ -45,7 +45,7 @@ and Plotly figure retrieval:
 ```
 
 ### DOCUMENTATION:
-Live here: [https://plot.ly/MATLAB](https://plot.ly/MATLAB)
+Live here: [https://plot.ly/matlab](https://plot.ly/matlab)
 
 ### CONTACT:
 - <chuck@plot.ly>
