Update map tile attribution

www/pages/credits.template.html

@@ -28,7 +28,7 @@
         <div class="block">
             <h2>Map Data and Styles</h2>
             <p>
-                Map data &copy; <a href="http://www.openmaptiles.org/" target="_system">OpenMapTiles</a>, &copy; <a href="https://www.openstreetmap.org/copyright" target="_system">OpenStreetMap</a> contributors.
+                Map data &copy; <a href="https://www.maptiler.com/copyright/" target="_system">MapTiler</a>, &copy; <a href="https://www.openstreetmap.org/copyright" target="_system">OpenStreetMap</a> contributors.
             </p>
             <h4>OSM Liberty map style</h4>
             <pre style="white-space: pre-line; overflow-wrap: break-word;">