Privacy: Expand Compose, revise Copilot

[majenny]

Rendered article section for review:

• Microsoft Edge Privacy Whitepaper > Compose
  • https://review.learn.microsoft.com/microsoft-edge/privacy-whitepaper/index?branch=pr-en-us-3206#compose
  • Before/Live
• Microsoft Edge Privacy Whitepaper > Copilot in Microsoft Edge sidebar
  • https://review.learn.microsoft.com/microsoft-edge/privacy-whitepaper/index?branch=pr-en-us-3206#copilot-in-microsoft-edge-sidebar
  • Before/Live

AB#51951149

[mikehoffms]

Approved PR per Writer/Editor review, after revisions were made.

[majenny]

This PR LGTM, thanks all for reviewing!

[sanketj]

LGTM with one suggestion.

[learn-build-service-prod]

Learn Build status updates of commit 25f8f70:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/privacy-whitepaper/index-images/compose.png	✅Succeeded	n/a (file deleted or renamed)
microsoft-edge/privacy-whitepaper/index-images/settings-and-more-icon.png	✅Succeeded	View
microsoft-edge/privacy-whitepaper/index-images/summarize-content.png	✅Succeeded	n/a (file deleted or renamed)
microsoft-edge/privacy-whitepaper/index.md	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[apryzgoda]

Edge Privacy Champ approved