update bulk export page heading

admin/partials/page-bulk-export.php

@@ -11,7 +11,7 @@
 
 ?>
 <div class="wrap">
-	<h1><?php esc_html_e( 'Bulk Export Articles', 'apple-news' ); ?></h1>
+	<h1><?php esc_html_e( 'Bulk Publish/Update Articles', 'apple-news' ); ?></h1>
 	<p><?php esc_html_e( "The following articles will be published to Apple News. Articles which are already published will be updated. Once started, it might take a while to complete. Please don't close the browser window or navigate away from this page.", 'apple-news' ); ?></p>
 	<?php
 	/**