Outdated documentation for vuln. db setup

[copernico]

The documentation at https://eclipse.github.io/steady/vuln_db/tutorials/vuln_db_tutorial/ is obsolete, does not consider the latest developments in project-kb + kb-importer.

[copernico]

This is right https://github.com/eclipse/steady/blob/master/docs/public/content/vuln_db/index.md

[henrikplate]

@copernico Can the issue be closed, or does the documentation require any further updates from your point of view?

[copernico]

Yes, the doc page look right now.

Heads-up: a new student is starting a 6-month internship to work on project-kb, improving this documentation further could be in the scope of his work.

Closing for now.