update date of footer (#42)

Author: schno-dot

_includes/footer.html

@@ -4,7 +4,7 @@
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     </a> | <a href="https://github.com/gematik1">GitHub</a>
   </p>
-  <p>© gematik GmbH 2022<br /><a href="https://www.gematik.de/impressum" target="_blank">Imprint (DE)</a> | <a href="https://www.gematik.de/datenschutz" target="_blank">Data privacy (DE)</a> | <a href="#" id="open_preferences_center">Update cookies preferences</a></p>
+  <p>© gematik GmbH 2024<br /><a href="https://www.gematik.de/impressum" target="_blank">Imprint (DE)</a> | <a href="https://www.gematik.de/datenschutz" target="_blank">Data privacy (DE)</a> | <a href="#" id="open_preferences_center">Update cookies preferences</a></p>
   <p></p>
   <p>Published with <a href="https://pages.github.com">GitHub Pages</a></p>
 </footer>