Update README.template.md

Author: CodeShellDev

.github/templates/README.template.md

@@ -2,7 +2,7 @@
 
 Mailauth is a Mailbox Manager which enables you too select between your Mailboxes and authenticate with your Mailserver (like [mailcow](https://github.com/mailcow/mailcow-dockerized))
 
-## Showcase
+## Screenshots
 
 ![mailauth-home](https://github.com/user-attachments/assets/934fb3a3-3160-4fcb-a30e-10b62a804411)