Update sondehub.js - Use preferred tile.openstreetmap.org URL

See openstreetmap/operations#737

Author: danieldegroot2

js/sondehub.js

@@ -570,7 +570,7 @@ function makeQuad(x, y, zoom) {
 
 // map type list
 
-var osm = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
+var osm = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
 	maxZoom: 19,
 	attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
 });