Updated wording in Benefits related to online upgrades (PGPRO-3952)

Author: Elena Indrupskaya

Author: alexanderlaw

doc/multimaster.xml

@@ -28,7 +28,7 @@
       </listitem>
       <listitem>
         <para>
-        <productname>PostgreSQL</productname> online upgrades
+         Upgrading minor releases of <productname>PostgreSQL</productname> seamlessly for <application>multimaster</application> cluster clients.
         </para>
       </listitem>
     </itemizedlist>