[CSS22] Refer to XML 1.1 instead of XML 1.0.

Author: bert-github

css2/syndata.src

@@ -1417,8 +1417,8 @@ title="character encoding">encoded</span> by a character encoding that
 supports the set of characters available in US-ASCII (e.g., UTF-8, ISO
 8859-x, SHIFT JIS, etc.).  For a good introduction to character sets
 and character encodings, please consult the HTML 4
-specification ([[-HTML4]], chapter 5). See also the XML 1.0
-specification ([[-XML10]], sections 2.2 and 4.3.3, and Appendix F).
+specification ([[-HTML4]], chapter 5). See also the XML 1.1
+specification ([[-XML11]], sections 2.2 and 4.3.3, and Appendix E).
 </p>
 <p>When a style sheet is embedded in another document, such as in the
 STYLE element or "style" attribute of HTML, the style sheet shares the