docs(readme.md): fix wrong import

Author: igormartimiano

README.md

@@ -34,7 +34,7 @@ _the following examples are meant to give you an idea of just some of the things
 
 ### The Basics
 ```js
-import { GoogleSpreadsheet } = from 'google-spreadsheet';
+import { GoogleSpreadsheet } from 'google-spreadsheet';
 import { JWT } from 'google-auth-library'