fix translation

Author: RaduCristianPopescu

includes/admin/feedzy-rss-feeds-import.php

@@ -190,6 +190,10 @@ public function enqueue_styles() {
 							esc_html__( 'Upload Import', 'feedzy-rss-feeds' )
 						),
 						'is_pro'              => feedzy_is_pro(),
+						'validation_messages' => array(
+							'invalid_feed_url' => __( 'Invalid feed URL.', 'feedzy-rss-feeds' ),
+							'error_validating_feed_url' => __( 'Error validating feed URL.', 'feedzy-rss-feeds' )
+						)
 					),
 				)
 			);