Update README.md

README.md

@@ -2,7 +2,7 @@
  <img src="./docs/imgs/paddlehub_logo.jpg" align="middle"  
 </p>
 
-[![Build Status](https://travis-ci.org/PaddlePaddle/PaddleHub.svg?branch=release/v1.6)](https://travis-ci.org/PaddlePaddle/PaddleHub)
+[![Build Status](https://travis-ci.org/PaddlePaddle/PaddleHub.svg?branch=release/v1.8)](https://travis-ci.org/PaddlePaddle/PaddleHub)
 [![License](https://img.shields.io/badge/license-Apache%202-red.svg)](LICENSE)
 [![Version](https://img.shields.io/github/release/PaddlePaddle/PaddleHub.svg)](https://github.com/PaddlePaddle/PaddleHub/releases)
 ![python version](https://img.shields.io/badge/python-3.6+-orange.svg)