Update docker-compose.yml

Minor change: the URL in the comment referred to version 4.3 instead of 4.4

4.4/contrib/docker-compose.yml

@@ -7,7 +7,7 @@ services:
         ports:
             - "8080:8080"
         environment:
-            # see https://github.com/mediagis/nominatim-docker/tree/master/4.3#configuration for more options
+            # see https://github.com/mediagis/nominatim-docker/tree/master/4.4#configuration for more options
             PBF_URL: https://download.geofabrik.de/europe/monaco-latest.osm.pbf
             REPLICATION_URL: https://download.geofabrik.de/europe/monaco-updates/
             NOMINATIM_PASSWORD: very_secure_password