Update copyright year

Signed-off-by: René Jochum <rene@jochum.dev>

layouts/partials/_widgets/copyright.html

@@ -2,7 +2,7 @@
         <div class="sidebar_wraper">
                 <div class="sidebar_inner">
                         <div class="text_widget">
-                                <p>&copy; 2013-2021 by René Jochum, under a <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">CC BY 4.0</a> license.</p>
+                                <p>&copy; 2013-2022 by René Jochum, under a <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">CC BY 4.0</a> license.</p>
                         </div>
                 </div>
         </div>