Add note about rebooting after registry change

[jadarnel27]

When trying to follow these steps, I noticed that, after updating the registry, we had to reboot the Windows 11 laptop before SQL Server could be installed / started up successfully.

[prmerger-automator]

@jadarnel27 : 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 81f9415:

✅ Validation status: passed

File	Status	Preview URL	Details
support/sql/database-engine/database-file-operations/troubleshoot-os-4kb-disk-sector-size.md	✅Succeeded

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[WilliamDAssafMSFT]

Thanks @jadarnel27 for contacting Microsoft with feedback about our product documentation. Confirming with engineering. It could take from a few business days to a few weeks to confirm your change internally. We'll contact you if we need further information, and you'll receive an email message each time we "@mention" you in a comment.

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[jadarnel27]

Thanks, William!