Update disks-shared.md

[NAO-MSFT]

In a recent support request, setting DiskIOPSReadOnly = 1 caused a boot failure due to read I/O stalling at the UEFI stage.

[prmerger-automator]

@NAO-MSFT : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 5a9e135:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/virtual-machines/disks-shared.md	✅Succeeded

For more details, please refer to the build report.

[v-regandowner]

@roygara - Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[NAO-MSFT]

@v-regandowner, is this still under the review? I'm not sure if roygara is an active user...

[roygara]

@NAO-MSFT This is pending review by the product team, who must validate and approve any changes like these. That'll take some time, I'll respond when they get back to me. :)

[NAO-MSFT]

@roygara, thank you for taking my pull request :)