Remove "+ 10 minutes" recommendation from how-to-restore-dropped-server.md

[jbunting]

When we tried to follow this doc, it failed with an internal server error. After working with support we got it to work by using the EXACT submission timestamp. Ticket tracking ID 2505220040007521.

[prmerger-automator]

@jbunting : 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 8487a1d:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/postgresql/flexible-server/how-to-restore-dropped-server.md	✅Succeeded

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[v-dirichards]

@kabharati

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

[VanMSFT]

#assign:markingmyname

[v-dirichards]

Hey @markingmyname

Can you review this PR and determine whether it needs to be closed or merged?

IMPORTANT: When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge. If the changes no longer apply, add an explanation and a #please-close comment to close the PR.

@MicrosoftDocs/public-repo-pr-review-team

[v-dirichards]

@markingmyname Could you review this proposed update to your article and enter #sign-off in a comment if it's ready to merge?

Thanks!