chore: update user guide with new features

[ReneSchroederLJ]

Description

• updated user guide to reflect new features

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files
• If helm chart has been changed, the chart version has been bumped to either next major, minor or patch level (compared to released chart).

[tom-rm-meyer-ISST]

Thanks a lot for your efforts. Proposed some small changes due to:

• consistency
• increasing understanding
• foss compliance

You should be able to add the proposals as a batch to a commit and do it all via the github ui (Y)

[tom-rm-meyer-ISST]

LGTM, thanks a lot!