Update history and regenerate docs.

doc/html/index.html

@@ -215,7 +215,7 @@
   </p>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: October 10, 2021 at 15:39:14 GMT</small></p></td>
+<td align="left"><p><small>Last revised: November 05, 2021 at 17:17:10 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>