chore(button): removing f from describe #5404

Author: rmkrmk

projects/igniteui-angular/src/lib/directives/button/button.directive.spec.ts

@@ -15,7 +15,7 @@ const FLAT_RAISED_OUTLINED_BUTTON_COSY = 'igx-button--cosy';
 const FAB_BUTTON_COMPACT = 'igx-button--fab-compact';
 const FAB_BUTTON_COSY = 'igx-button--fab-cosy';
 
-fdescribe('IgxButton', () => {
+describe('IgxButton', () => {
     configureTestSuite();
 
     const baseClass = 'igx-button';