Update README.md

Author: carloskotacho

README.md

@@ -23,7 +23,7 @@ Consuming external API [message-api](https://github.com/carloskotacho/message-ap
 
 ## Showcase
 
-![ERD_of_Message](https://user-images.githubusercontent.com/22691244/77832001-8a7c3500-7111-11ea-9757-ece581adda2e.png)
+![ERD_of_Message](https://user-images.githubusercontent.com/22691244/77832468-2491ac80-7115-11ea-9b1c-a5bfc78486c5.png)
 
 ## Build