Fix playground example import (#2220)

Summary:
Fixes  #2219
Pull Request resolved: #2220

Differential Revision: D18056744

Pulled By: claudiopro

fbshipit-source-id: 02f0fb1848fdfa9e928bbf0be038213ba21cd4cc

Author: ryanleecode

examples/draft-0-10-0/playground/src/App.js

@@ -27,7 +27,7 @@ import JSONTree from 'react-json-tree';
 import {convertToHTML} from 'draft-convert';
 import PanelGroup from 'react-panelgroup';
 import gkx from 'draft-js/lib/gkx';
-import convertFromHTMLModern from 'draft-js/lib/convertFromHTMLToContentBlocks2';
+import convertFromHTMLModern from 'draft-js/lib/convertFromHTMLToContentBlocks';
 
 import {
   ContentState,