Fix deck.gl version

Author: cschotte

Samples/3D-layer/newyork/newyork.html

@@ -17,7 +17,7 @@
     <script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.js"></script>
 
     <!-- deck.gl is a WebGL-powered framework for visual exploratory data analysis of large datasets. -->
-    <script src="https://unpkg.com/deck.gl@latest/dist.min.js"></script>
+    <script src="https://unpkg.com/deck.gl@^8/dist.min.js"></script>
 
     <script>
         var map;