Fix Hans' name in SGML.

doc/src/sgml/installation.sgml

-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.161 2003/10/26 00:31:48 momjian Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.162 2003/10/26 00:58:31 momjian Exp $ -->
 
 <chapter id="installation">
  <title><![%standalone-include[<productname>PostgreSQL</>]]>
@@ -1531,7 +1531,7 @@ gunzip -c postgres.ps.gz \
 	<entry><systemitem>RS6000</></entry>
 	<entry>7.4</entry>
 	<entry>2003-10-25,
-	  Hans-J?rgen Sch?nig (<email>hs@cybertec.at</email>)</entry>
+	  Hans-J&uuml;rgen Sch&ouml;nig (<email>hs@cybertec.at</email>)</entry>
         <entry>see also <filename>doc/FAQ_AIX</filename></entry>
        </row>
        <row>