update changes section

Author: davidcarlisle

docs/index.html

@@ -67,7 +67,7 @@ <h2><a id="status"></a>Status of this Document</h2>
 as a Recommendation and as part of the W3C 
 <a href="https://www.w3.org/Math/Activity">Math Activity</a>.
 The goals of the W3C Math Working Group are discussed in the 
-<a href="https://www.w3.org/Math/Documents/Charter2006.html"> W3C Math WG Charter</a>.  
+<a href="https://www.w3.org/Math/Documents/Charter2021.html"> W3C Math WG Charter</a>.  
 The authors of this document are W3C Math Working Group members.
 </p>
 
@@ -394,11 +394,11 @@ <h3><a id="chars_math-combining-tables"></a>A.4 Entities Defined to be a Combini
 </div></div><div class="div1">
 <h2><a id="changes"></a>B Changes</h2><div class="div2">
 <h3><a id="changes20140410"></a>B.1 Changes since 2014-04-10 (Second Edition Recommendation)</h3>
-<p>Source files updated to Unicode 14.0, affecting the character tables,
+<p>Source files updated to Unicode 15.0, affecting the character tables,
       but with no changes to generated entity files or stylesheets.
-      New table for the FE01 Variation selector and greatly extended set of variations in the U+FE00 table (most of these standardised variants were added at Unicode 14). The script alphabet table has been extended to show both variants.</p>
+      New table for the U+FE01 Variation selector and greatly extended set of variations in the U+FE00 table (most of these standardised variants were added at Unicode 14). The script alphabet table has been extended to show both variants.</p>
 
-<p>Reference added to the September 2020 W3C Process Document.</p>
+<p>Reference added to the November 2021 W3C Process Document.</p>
 
 <p>Some changes to the front matter including link to GitHub as
      required by the latest W3C publication process.</p>