Update the copyright year.

layouts/partials/footer.html

@@ -7,7 +7,7 @@
           {{ end}}
         {{ end }}
     </p>
-    Copyright &copy; 2022 by <a style="color: inherit;" href="https://gitlab.redox-os.org/redox-os"><b>Redox Developers</b></a>
+    Copyright &copy; 2023 by <a style="color: inherit;" href="https://gitlab.redox-os.org/redox-os"><b>Redox Developers</b></a>
 </footer>
 </body>
 </html>