update coverage url

README.md

@@ -70,7 +70,7 @@ Bugs and Issues
 [Build Status]:      https://img.shields.io/travis/shadowsocks/shadowsocks/master.svg?style=flat
 [Configuration]:     https://github.com/shadowsocks/shadowsocks/wiki/Configuration-via-Config-File
 [Coverage Status]:   https://jenkins.shadowvpn.org/result/shadowsocks
-[Coverage]:          https://jenkins.shadowvpn.org/job/Shadowsocks/ws/htmlcov/index.html
+[Coverage]:          https://jenkins.shadowvpn.org/job/Shadowsocks/ws/PYENV/py34/label/linux01/htmlcov/index.html
 [Debian sid]:        https://packages.debian.org/unstable/python/shadowsocks
 [iOS]:               https://github.com/shadowsocks/shadowsocks-iOS/wiki/Help
 [Issue Tracker]:     https://github.com/shadowsocks/shadowsocks/issues?state=open