corrected workspace config due to changes

Merge after https://github.com/sulu-cmf/SuluWebsiteBundle/pull/4

- [x] test coverage
- [ ] finish the code
- [x] gather feedback for my changes
- [x] submit changes to the documentation


| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   | none
| Fixed tickets | yes
| Doc           | none