Update turn-off-directory-synchronization.md

[frenzied-state]

Updated the command Update-MgBetaOrganization to Update-MgOrganization. The beta version of the command no longer works. I've tested this in my dev tenant and in a production environment. I've linked the Learn article for Update-MgOrganization below. I'd also suggest removing the command to install the MgGraph beta, but I haven't tested that.

https://learn.microsoft.com/en-us/microsoft-365/enterprise/turn-off-directory-synchronization?view=o365-worldwide

[learn-build-service-prod]

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[learn-build-service-prod]

Learn Build status updates of commit ba01cbe:

⚠️ Validation status: warnings

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Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

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[kelleyvice-msft]

No file updated, closing.