XEP-0230: Fix example 2, add missing 'node' attribute

xep-0230.xml

@@ -24,6 +24,12 @@
   <shortname>NOT YET ASSIGNED</shortname>
   &hildjj;
   &stpeter;
+  <revision>
+    <version>0.1.2</version>
+    <date>2018-09-08</date>
+    <initials>fs</initials>
+    <remark><p>Add forgotten node attribute in example 2.</p></remark>
+  </revision>
   <revision>
     <version>0.1.1</version>
     <date>2016-10-04</date>
@@ -66,7 +72,8 @@
     to='chat.shakespeare.lit'
     id='items1'>
   <query xmlns='http://jabber.org/protocol/disco#items'>
-    <subscribe xmlns='http://jabber.org/protocol/pubsub'/>
+    <subscribe xmlns='http://jabber.org/protocol/pubsub'
+               node='http://jabber.org/protocol/disco#items'/>
   </query>
 </iq>
 ]]></example>