Update alert text

Author: Xie, Ziyu

src/app/views/demo/map/bus-line/bus-line.component.html

@@ -1,7 +1,7 @@
 <div class="card card-accent-info">
   <div class="card-body">
     <h4 class="card-title">Bus Lines of Beijing (Baidu Map)</h4>
-    <div class="alert alert-info"><i class="fa fa-info mr-2"></i> Need to include <strong>bmap.js</strong> and <strong>Baidu Map</strong> API: http://api.map.baidu.com/api?v=2.0&ak=ACCESS_KEY </div>
+    <div class="alert alert-info"><i class="fa fa-info mr-2"></i> Need to include <strong>bmap.js</strong> and <strong>Baidu Map</strong> API: https://api.map.baidu.com/api?v=2.0&ak=ACCESS_KEY </div>
     <div class="mt-4">
       <tabset>
         <tab heading="demo">