fix namespace

rest/query-to-xml-xslt.xml

@@ -3,10 +3,10 @@
 Copyright (c) Daniel Sheffield 2022
 All rights reserved.
 -->
-<xsl:stylesheet version="1.0"
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
-    xmlns="http://www.w3.org/1999/xhtml"
+<xsl:stylesheet version="1.1"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+  xmlns:xhtml="http://www.w3.org/1999/xhtml"
 >
 
   <xsl:output method="xml"