Integrate OCC review feedback into the Power Bi baseline

[adhilto]

🗣 Description

This update includes the following changes to the PowerBI security configuration baseline:

• Changes to improve overall consistency of format and language throughout
• Language and verbiage updates for increased reader clarity

This update does NOT include any materially significant changes to the number of or content in policy items in the baseline itself that would require a change in settings to align with the baseline recommendations.

💭 Motivation and context

The updates included further refine and improve the overall readability and clarity of the baseline document. The result should be a baseline that is easier to interpret and use as a reference for M365 tenant administrators.

Closes #714

🧪 Testing

Compare the separately provided Word version with track changes of the PowerBI baseline document with the changes in the markdown in this branch. Accepted/modified suggested changes as appropriate and mirrored in markdown, rejected and additional changes commented in Word and sync'd to markdown as needed.

Manual review of markdown and helps ensure that the automated markdown test on the PR passes.

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• All relevant repo and/or project documentation has been updated
  to reflect the changes in this PR.
• All new and existing tests pass.

✅ Pre-merge checklist

✅ Post-merge checklist

[buidav]

one thing we noticed was acknowledgments were silently removed. remove the section from the markdowns here as well.