docs: fix Travis CI build status

Signed-off-by: Trumeet <[email protected]>

Author: Trumeet

README.md

@@ -1,7 +1,7 @@
 [![](https://img.shields.io/docker/build/thnuiwelr/mipush.svg)](https://hub.docker.com/r/thnuiwelr/mipush/)
 [![](https://img.shields.io/docker/pulls/thnuiwelr/mipush.svg)](https://hub.docker.com/r/thnuiwelr/mipush/)
 [![](https://img.shields.io/microbadger/image-size/thnuiwelr/mipush.svg)](https://hub.docker.com/r/thnuiwelr/mipush/)
-[![Build Status](https://travis-ci.com/Trumeet/MiPushTester.svg?branch=master)](https://travis-ci.com/Trumeet/MiPushTester)
+[![Build Status](https://travis-ci.org/Trumeet/MiPushTester.svg?branch=master)](https://travis-ci.org/Trumeet/MiPushTester)
 
 # MiPush Tester (Alpha)