update copyright year
diff --git a/_includes/footer.html b/_includes/footer.html
index 161f223..56da600 100644
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -1,7 +1,7 @@
<p class="push"></p>
<div id="footer" class="mw">
<div class="wrapper">
-Copyright © 2012-2020 The Apache Software Foundation, licensed under the Apache License, Version 2.0.<br>
+Copyright © 2012-2022 The Apache Software Foundation, licensed under the Apache License, Version 2.0.<br>
Apache and the Apache feather logo are trademarks of The Apache Software Foundation. Other names appearing on the site may be trademarks of their respective owners.<br/><br/>
</div>
</div>