Fix validation

Author: Dmitri Popov

references/podman-usage.xml

@@ -54,6 +54,7 @@
       registries configured in the
       <filename>/etc/containers/registries.conf</filename> file. The default
       image tag is <literal>latest</literal>.
+      </para>
     <para>
       To view all possible options of the <command>podman pull</command>
       command, run: