Updated the password in the documentation

To make it match the updated version required to work with the latest platform

Author: NathanJPhillips

gitlab-integration/README

@@ -7,7 +7,7 @@ and the Gitlab runner.
    Check it is working by manually creating a project and running an analysis
    on a test project, such as github.com/smowton/security-demo.git
 
-2. Create a user named 'diffblue' with password 'password'
+2. Create a user named 'diffblue' with password 'password123'
 
 3. Install Node.js and npm