Rephrase default username and password

sonarqube/content.md

@@ -16,7 +16,7 @@ The server is started this way:
 $ docker run -d --name sonarqube -p 9000:9000 -p 9092:9092 %%IMAGE%%
 ```
 
-The [default username and password](https://docs.sonarqube.org/display/SONAR/Authentication) is `admin:admin`.
+By default you can login as `admin` with password `admin`, see [authentication](https://docs.sonarqube.org/display/SONAR/Authentication).
 
 To analyse a project: