[site-reviews] custom singular/plural summary text

$counts = (array) get_post_meta( get_the_ID(), '_glsr_count', true );
$counts = wp_parse_args( $counts, ['local' => []] );
$counts = intval( array_sum( $counts['local'] ));
$text = _n( '{num} customer review', '{num} customer reviews', $counts, 'storefront-child' );
echo do_shortcode( '[site_reviews_summary assigned_to=post_id text="'.$text.'"]' );