Update README.md

Author: LasseRafn

README.md

@@ -29,6 +29,7 @@ echo (new LasseRafn\Initials\Initials)->name('Justine Bieber')->generate();
 echo (new LasseRafn\Initials\Initials('John Christian Doe'))->generate();       // Output: JD
 echo (new LasseRafn\Initials\Initials)->generate('Leonardo');                   // Output: LE
 echo (new LasseRafn\Initials\Initials)->length(1)->generate('Camilla');         // Output: C
+echo (new LasseRafn\Initials\Initials)->length(3)->name('Jens Ølsted')->getUrlfriendlyInitials();         // Output: JOL
 ````
 
 ## Supported methods and parameters
@@ -43,4 +44,4 @@ $initials->name('Albert Magnum')->length(3)->generate();
 ````
 
 ## Requirements
-* PHP 7.0 or 7.1
+* PHP 7.0 or 7.1