Fix new headers functions in php 8.4

Author: Seldaek

resources/functionMap_php84delta.php

@@ -15,8 +15,8 @@
  */
 return [
 	'new' => [
-		'http_get_last_response_header ' => ['list<string>'],
-		'http_clear_last_response_header' => ['void'],
+		'http_get_last_response_headers' => ['list<string>|null'],
+		'http_clear_last_response_headers' => ['void'],
 		'mb_lcfirst' => ['string', 'string'=>'string', 'encoding='=>'string'],
 		'mb_ucfirst' => ['string', 'string'=>'string', 'encoding='=>'string'],
 	],