Update OSM attribution link

openmaptiles.yaml

@@ -20,7 +20,7 @@ tileset:
   version: 3.3.0
   id: openmaptiles
   description: "A tileset showcasing all layers in OpenMapTiles. https://openmaptiles.org"
-  attribution: '<a href="https://www.openmaptiles.org/" target="_blank">&copy; OpenMapTiles</a> <a href="https://www.openstreetmap.org/about/" target="_blank">&copy; OpenStreetMap contributors</a>'
+  attribution: '<a href="https://www.openmaptiles.org/" target="_blank">&copy; OpenMapTiles</a> <a href="https://www.openstreetmap.org/copyright" target="_blank">&copy; OpenStreetMap contributors</a>'
   center: [-12.2168, 28.6135, 4]
   maxzoom: 14
   minzoom: 0