Fix deadlink in docs for ci/examples

doc/ci/examples/README.md

 # Build script examples
-+ [Test and deploy Ruby Application to Heroku](test-and-deploy-ruby-application-to-heroku.md)
-+ [Test and deploy Python Application to Heroku](test-and-deploy-python-application-to-heroku.md)
-+ [Test Clojure applications](examples/test-clojure-application.md)
++ [Test and deploy Ruby applications to Heroku](test-and-deploy-ruby-application-to-heroku.md)
++ [Test and deploy Python applications to Heroku](test-and-deploy-python-application-to-heroku.md)
++ [Test Clojure applications](test-clojure-application.md)