Add type ping to lang file

src/lang/en_US.lang.php

@@ -135,6 +135,7 @@ $sm_lang = array(
 		'type' => 'Type',
 		'type_website' => 'Website',
 		'type_service' => 'Service',
+		'type_ping' => 'Ping',
 		'pattern' => 'Search string/pattern',
 		'pattern_description' => 'If this pattern is not found on the website, the server will be marked offline. Regular expressions are allowed.',
 		'last_check' => 'Last check',
@@ -316,4 +317,4 @@ $sm_lang = array(
 		'401_unauthorized' => 'Unauthorized',
 		'401_unauthorized_description' => 'You do not have the privileges to view this page.',
 	),
-);
+);