Updated Readme

Updated Readme to reflect change in jenkins build

README.md

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 # Welcome to WSO2 IoT Server
 
 <a href='https://opensource.org/licenses/Apache-2.0'><img src='https://img.shields.io/badge/License-Apache%202.0-blue.svg'></a><br/>
-<a href='https://wso2.org/jenkins/job/products/job/product-iots__java8/'><img src='https://wso2.org/jenkins/job/products/job/product-iots__java8/badge/icon'></a> - Java8
+<a href='https://wso2.org/jenkins/job/products/job/product-iots__java8/'><img src='https://wso2.org/jenkins/job/products/job/product-iots/badge/icon'></a> - Java8
 
 WSO2 IoT Server is a complete solution that enables device manufacturers and enterprises to connect and manage their devices, build apps, manage events, secure devices and data, and visualize sensor data in a scalable manner.