Add details about custom privileges required for running desktop flows

[Nicolas-Ding]

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[prmerger-automator]

@Nicolas-Ding : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit bdb0db4:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/desktop-flows/desktop-flows-security.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
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[learn-build-service-prod]

Learn Build status updates of commit d177d5e:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/desktop-flows/desktop-flows-security.md	✅Succeeded

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

[prmerger-automator]

@Nicolas-Ding : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit aa2d2fa:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/desktop-flows/desktop-flows-security.md	✅Succeeded

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