fix: update link to a build status badge (#13334)

Author: drauggres

README.md

@@ -1,6 +1,6 @@
 <palign="center"><ahref="https://titaniumsdk.com"target="_blank"><imgwidth="120"src=".github/logo-titanium.png"></a></p>
 
-<h1align="center">Titanium <ahref="https://jenkins.appcelerator.org/job/titanium-sdk/job/titanium_mobile/job/master/"target="_blank"><imgsrc="https://jenkins.appcelerator.org/buildStatus/icon?job=titanium-sdk/titanium_mobile/master" /></a></h1>
+<h1align="center">Titanium <ahref="https://github.com/tidev/titanium_mobile/actions/workflows/build.yml?query=branch%3Amaster"target="_blank"><imgsrc="https://github.com/tidev/titanium_mobile/actions/workflows/build.yml/badge.svg?branch=master" /></a></h1>
 
 Welcome to the Titanium open source project. Titanium provides a mature platform for developers to build
 completely native cross-platform mobile applications using JavaScript.