XEP-0153: Add missing EMAIL/USERID element in example

The implementation notes in XEP-0054 say “Email addresses MUST be
contained in a <USERID> element, not included as CDATA within the
<EMAIL/> element.”

xep-0153.xml

@@ -26,6 +26,12 @@
     <url>http://www.xmpp.org/schemas/vcard-avatar.xsd</url>
   </schemaloc>
   &stpeter;
+  <revision>
+    <version>1.1.1</version>
+    <date>2024-06-10</date>
+    <initials>egp</initials>
+    <remark><p>XEP-0054 says “Email addresses MUST be contained in a &lt;USERID&gt; element”.</p></remark>
+  </revision>
   <revision>
     <version>1.1</version>
     <date>2018-02-26</date>
@@ -103,7 +109,7 @@
     </ADR>
     <NICKNAME/>
     <N><GIVEN>Juliet</GIVEN><FAMILY>Capulet</FAMILY></N>
-    <EMAIL>[email protected]</EMAIL>
+    <EMAIL><USERID>[email protected]</USERID></EMAIL>
     <PHOTO>
       <TYPE>image/jpeg</TYPE>
       <BINVAL>
@@ -151,7 +157,7 @@
     </ADR>
     <NICKNAME/>
     <N><GIVEN>Juliet</GIVEN><FAMILY>Capulet</FAMILY></N>
-    <EMAIL>[email protected]</EMAIL>
+    <EMAIL><USERID>[email protected]</USERID></EMAIL>
     <PHOTO>
       <TYPE>image/jpeg</TYPE>
       <BINVAL>