Fix trailing comma.

spearhead/header.php

@@ -63,7 +63,7 @@ $header_classes .= $has_primary_nav ? ' has-menu' : '';
 									'link_after'      => '</span>' . seedlet_get_icon_svg( 'link' ),
 									'container_class' => 'social-navigation',
 									'depth'           => 1,
-								),
+								)
 							);
 						endif;
 						?>