修复3857示例url错误

Author: xilanhuaweidapao

examples/openlayers/01_tiledMapLayer3857.html

@@ -14,7 +14,7 @@
     <script type="text/javascript">
       var map,
         url =
-          (window.isLocal ? window.server : 'https:iserver.supermap.io') +
+          (window.isLocal ? window.server : 'https://iserver.supermap.io') +
           '/iserver/services/map-china400/rest/maps/China';
       // 方式一：1.调用 ol.supermap.initMap，根据 SuperMap iServer 地图服务的地图信息，创建地图和底图
       ol.supermap.initMap(url, {