Description changes for multiple items in configuration.md json

[LingTheBug]

Description

Two descriptions need changed in the configuration.md json example:
UnattendedMode needs a description
Margin has the seemingly incorrect description

Use Case

Updated documentation provides clear example and understanding of configuration for end users

Details

No response

Pre-Submission Checklist

• This is a feature request and not a bug report

• I have checked for related issues and checked the documentation

[3rob3]

These are both unused settings that were carried forward from the old standalone version. There is already a PR that removes Margin, UnattendedMode should also be removed everywhere.

[JW-CH]

Removed with #402