Fix Jenkins link badge (#4066)

docs/README.md

@@ -1,6 +1,6 @@
 ![npm](https://img.shields.io/npm/dw/react-native-navigation.svg)
 [![npm (tag)](https://img.shields.io/npm/v/react-native-navigation/alpha.svg)](https://github.com/wix/react-native-navigation/tree/v2#react-native-navigation-v2-wip)
-[![Build Status](https://img.shields.io/jenkins/s/http/jenkins-oss.wixpress.com:8080/job/react-native-navigation-master.svg)](https://jenkins-oss.wixpress.com/job/react-native-navigation-master/)
+[![Build Status](https://img.shields.io/jenkins/s/http/jenkins-oss.wixpress.com/job/react-native-navigation-master.svg)](https://jenkins-oss.wixpress.com/job/react-native-navigation-master/)
 [![Join us on Discord](https://img.shields.io/badge/discord-react--native--navigation-738bd7.svg?style=flat)](https://discord.gg/DhkZjq2)
 [![StackExchange](https://img.shields.io/stackexchange/stackoverflow/t/react-native-navigation.svg)](https://stackoverflow.com/questions/tagged/react-native-navigation)