Updated screenshot capture to reflect the use of "number" option

Author: mickaelandrieu

README.md

@@ -7,7 +7,8 @@ Certificationy CLI
 This is the CLI tool to train on certifications.
 
 # How it looks?
-![Certificationy application](http://vincent.composieux.fr/assets/img/blog/certificationy-console.png "Certificationy application")
+
+![Certificationy application](https://cloud.githubusercontent.com/assets/1247388/17698070/434e3944-63b9-11e6-80c6-91706dbbea50.png "Certificationy application")
 
 # Installation and update