add link to bug tracker

includes/footer.php

@@ -18,6 +18,11 @@
  */
 ?>
 <footer>
+	<div>
+		Please report any bugs or incorrect information regarding the add-ons to the
+		<a href="https://gitlab.trisquel.org/joeall/mozzarella/-/issues">Mozzarella bug tracker</a>.
+	</div>
+
 	<a href="https://github.com/spdx/license-list-data/blob/master/json/licenses.json">Licenses</a>
 	<?php 
 		// get the locales