Update functionMap.php for SplFileInfo::getPathInfo return type

SplFileInfo::getPathInfo can return null as per documentation https://www.php.net/manual/en/splfileinfo.getpathinfo.php

Author: DannyvdSluijs

Diff for: resources/functionMap.php

@@ -11556,7 +11556,7 @@
 'SplFileInfo::getMTime' => ['__benevolent<int|false>'],
 'SplFileInfo::getOwner' => ['__benevolent<int|false>'],
 'SplFileInfo::getPath' => ['string'],
-'SplFileInfo::getPathInfo' => ['SplFileInfo', 'class_name='=>'string'],
+'SplFileInfo::getPathInfo' => ['SplFileInfo|null', 'class_name='=>'string'],
 'SplFileInfo::getPathname' => ['string'],
 'SplFileInfo::getPerms' => ['__benevolent<int|false>'],
 'SplFileInfo::getRealPath' => ['__benevolent<string|false>'],