Fix revision typo in reference/var/functions/unserialize (#1989)

Author: Fan2Shrek

reference/var/functions/unserialize.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: d75036c386e37ce56dafb7607b72aedc3e33fe09iner: yannick Status: ready -->
+<!-- EN-Revision: d75036c386e37ce56dafb7607b72aedc3e33fe09 Maintainer: yannick Status: ready -->
 <!-- Reviewed: no -->
 <refentry xml:id="function.unserialize" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>