update client upload example

fix upload url typo

Author: sabakugaara

examples/client-upload/index.html

@@ -41,7 +41,7 @@
             uploadData.append('policy', data.policy);
             uploadData.append('authorization', data.authorization);
             $.ajax({
-                url: '//v0.api.upyun.com/sdkimg',
+                url: 'http://v0.api.upyun.com/sdkimg',
                 type: 'POST',
                 data: uploadData,
                 cache: false,