Revert "DOC: fix for PGPRO-1437"

This reverts commit 36056e5.

Author: Liudmila Mantrova

doc/src/sgml/release-pro-10.sgml

@@ -51,7 +51,7 @@
         <!-- 8829bc249562295bf212ce1021bf6a41da6fe0c7 -->
       </listitem>
       <listitem>
-        <para>Updated <filename>pg_pathman</filename> module to
+        <para>Updated <xref linkend="pg-pathman"> module to
             version 1.4.9. This version fixes handling of <literal>ONLY</literal>
             in all kinds of queries.
             (See <xref linkend="pg-pathman"> and <xref linkend="pg-pathman-how-to-update">.)