Update README.md

Author: Tech5G5G

README.md

@@ -8,4 +8,4 @@ An app to organize your email inboxes
 * Outlook (Opens .exe)
 
 ## Preview
-<img src=https://github.com/Tech5G5G/Email-Inboxes/raw/master/Email%20Inboxes%20Preview.png>
+<img src=https://github.com/Tech5G5G/Email-Inboxes/raw/master/Email%20Inboxes%20Showcase.png>