[Sync EN] Add xlink namespace to Uri\WhatWg\UrlValidationErrorType XML (#2731)

* Initial plan

* Add xlink namespace to URL validation error type XML and update EN-Revision

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Co-authored-by: lacatoire <20201470+lacatoire@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: lacatoire <20201470+lacatoire@users.noreply.github.com>

Author: Copilot

reference/uri/uri.whatwg.urlvalidationerrortype.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: 66d06b9c7c95ead73080ea7f0ac25dd11a052f71 Maintainer: lacatoire Status: ready -->
-<reference xml:id="enum.uri-whatwg-urlvalidationerrortype" role="enum" xmlns="http://docbook.org/ns/docbook">
+<!-- EN-Revision: 8352249a84d0b91b38c741ff1c256061127dbfbb Maintainer: lacatoire Status: ready -->
+<reference xml:id="enum.uri-whatwg-urlvalidationerrortype" role="enum" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://docbook.org/ns/docbook">
  <title>L'énumération Uri\WhatWg\UrlValidationErrorType</title>
  <titleabbrev>Uri\WhatWg\UrlValidationErrorType</titleabbrev>