Sample application link missing from documentation

[twoversionsofme]

I was looking to investigate using the project and wanted to see an example, but the documentation is missing the link to the project. I've highlighted the area where it seems to be broken.

Reference URL: https://docs.spring.io/spring-session-data-mongodb/docs/2.2.3.RELEASE/reference/htmlsingle/boot-mongo.html#mongo-sample