Update README.md

README.md

@@ -168,7 +168,7 @@ DC.ready(() => {
 
 <p>
 <img src="http://dc.dvgis.cn/examples/images/base/q1.png?v=2"  style="width:60px;height:60px" title="数字视觉"/>
-<img src="http://dc.dvgis.cn/examples/images/base/q2.png?v=5" style="width:60px;height:60px" title="Cesium开心农场"/>
+<img src="http://dc.dvgis.cn/examples/images/base/q2.png?v=6" style="width:60px;height:60px" title="Cesium开心农场"/>
 </p>
 
 ## Support