Fix WhatsApp message receiving link in README

Author: ruskibenya

README.md

@@ -51,10 +51,11 @@ Tutorial
 
 ### WhatsApp
 <br>
+
 Tutorial                                                                                                                                                        | Code Sample
 --------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------
 [How to Send WhatsApp Messages with Ruby on Rails](#)                            | [outbound_whatsapp_controller.rb](app/controllers/outbound_whatsapp_controller.rb)
-[How to Receive WhatsApp Messages with Ruby on Rails](#)                            | [outbound_whatsapp_controller.rb](app/controllers/outbound_whatsapp_controller.rb)
+[How to Receive WhatsApp Messages with Ruby on Rails](#)                            | [inbound_whatsapp_controller.rb](app/controllers/inbound_whatsapp_controller.rb)
 
 ## Request More Examples
 <br>