Update faq.md - Azure Virtual Network Manager

[mrstruck]

Adding question to FAQ: Can I move a subscription with an Azure Virtual Network Manager to another tenant?

[prmerger-automator[bot]]

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit e9a9883:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/virtual-network-manager/faq.md	:white_check_mark: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

[mbender-ms]

sign-off