Change Previous and Next Link Text in WP Posts Navigation

navigation.php

<?php


add_action( 'genesis_entry_footer', 'genesis_prev_next_post_nav_cpt' );
/**
 * Display links to previous and next post, from a single post.
 *
 * @since 1.5.1
 *
 * @return null Return early if not a post.
 */
function genesis_prev_next_post_nav_cpt() {

	if ( ! is_singular( array( 'portfolio', 'post' ) ) )//targetting an array here
		return;

	genesis_markup( array(
		'html5'   => '<div %s>',
		'xhtml'   => '<div class="navigation">',
		'context' => 'adjacent-entry-pagination',
	) );

	echo '<div class="pagination-previous alignleft">';
	previous_post_link('&laquo; %link', 'Previous Post'); //Change label navigation text to suit
	echo '</div>';

	echo '<div class="pagination-next alignright">';
	next_post_link(' %link', 'Next Post &raquo;'); //Change label navigation text to suit
	echo '</div>';

	echo '</div>';

}