Update year

Author: pgleeson

docs/XML/Forrest/skinconf.xml

@@ -83,7 +83,7 @@ which will be used to configure the chosen Forrest skin.
   <favicon-url>images/favicon.ico</favicon-url>
 
   <!-- The following are used to construct a copyright statement -->
-  <year>2020</year>
+  <year>2022</year>
   <vendor>UCL</vendor>
   <!-- The optional copyright-link URL will be used as a link in the
     copyright statement