Add "will not be published" to the Email input in comment fields

gistfile1.php

add_filter( 'comment_form_default_fields', 'generate_custom_comment_fields' );
function generate_custom_comment_fields()
{
	$fields = array(
		'author' => '<input placeholder="' . __( 'Name','generate' ) . ' *" id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" />',
		'email' => '<input placeholder="' . __( 'Email (will not be published)','generate' ) . ' *" id="email" name="email" type="text" value="' . esc_attr(  $commenter['comment_author_email'] ) . '" size="30" />',
		'url' => '<input placeholder="' . __( 'Website','generate' ) . '" id="url" name="url" type="text" value="' . esc_attr( $commenter['comment_author_url'] ) . '" size="30" />',
	);
	
	return $fields;
}