Update index.md

I think these should be single quotes rather than back ticks?

Author: GMTechBen

content/get-started/index.md

@@ -71,7 +71,7 @@ To bundle the `lodash` dependency with the `index.js`, we need to import `lodash
 __app/index.js__
 
 ```diff
-+ import _ from `lodash`;
++ import _ from 'lodash';
 
 function component () {
   ...