Amend README.md

Author: gilesgas

README.md

@@ -5,8 +5,9 @@ This repository is for the
 tutorial in the [Jenkins User Documentation](https://jenkins.io/doc/).
 
 The repository contains a simple Java application which outputs the string
-"Hello world!" and is accompanied by a unit test to check that the main
-application works as expected.
+"Hello world!" and is accompanied by a couple of unit tests to check that the
+main application works as expected. The results of these tests are saved to a
+JUnit XML report.
 
 The `jenkins` directory contains an example of the `Jenkinsfile` (i.e. Pipeline)
 you'll be creating yourself during the tutorial and the `scripts` subdirectory