Update README.MD

Author: JaZo

README.MD

@@ -455,6 +455,6 @@ If you discover any security related issues, please email [email protected] inste
 The MIT License (MIT). Please see [License File](LICENSE) for more information.
 
 
-## SWIS
+## SWIS :heart: Open Source
 
 [SWIS](https://www.swis.nl) is a web agency from Leiden, the Netherlands. We love working with open source software.