fixed parameter name of posix_getrlimit()

refs: https://www.php.net/manual/en/function.posix-getrlimit.php

Author: mumumu

appendices/migration83/new-features.xml

@@ -155,7 +155,7 @@ echo $user_ini['listen']; // localhost:9000
 
   <para>
    <function>posix_getrlimit</function> now takes an optional
-   <parameter>$res</parameter> parameter to allow fetching a single resource limit.
+   <parameter>$resource</parameter> parameter to allow fetching a single resource limit.
   </para>
 
   <para>