DAC: Review and improve terminology, fix typos

Impacted Sections

List UNTP specification page(s) that are impacted by this issue. For example:

• https://untp.unece.org/docs/specification/DecentralisedAccessControl

Issue Description

This issue is in response to this issue #241 which is a large amount of feedback to the DAC page. This issue captures a low priority issues of fixing typos and improving terminology.

Scope

• Fix tpo.
• Consider adding note explaining "secret" terminology choice
• Review other terminology for clarity.

I Have

• Added the relevant labels (e.g. WG-Adoption, WG-Conformity, WG-SupplyChain, WG-Technical, WG-Steering, etc.).