fix display css utilities classes

Author: cedric07

header.php

@@ -27,10 +27,10 @@
 	<?php wp_body_open(); ?>
 	<nav class="skip-links skip-links--hidden" aria-label="<?php esc_attr_e( 'Fast access links', 'beapi-frontend-framework' ); ?>">
 		<ul>
-			<li class="display-desktop-only">
+			<li class="is-desktop-only">
 				<a href="#menu"><?php esc_html_e( 'Go to main navigation menu', 'beapi-frontend-framework' ); ?></a>
 			</li>
-			<li class="display-mobile-only">
+			<li class="is-mobile-only">
 				<a href="#menu-toggle"><?php esc_html_e( 'Go to main navigation menu', 'beapi-frontend-framework' ); ?></a>
 			</li>
 			<li>

src/scss/04-utilities/_display.scss

@@ -9,7 +9,7 @@
  */
 
 // Visible only on mobile (below mobile-to-desktop-nav breakpoint)
-.display-mobile-only {
+.is-mobile-only {
 	@include breakpoints(mobile-to-desktop-nav) {
 		@include style-only {
 			display: none !important;
@@ -18,7 +18,7 @@
 }
 
 // Visible only on desktop (at or above mobile-to-desktop-nav breakpoint)
-.display-desktop-only {
+.is-desktop-only {
 	@include breakpoints(mobile-to-desktop-nav, max) {
 		@include style-only {
 			display: none !important;