Update backup-plan-to-protect-against-ransomware.md

[Sarit1046]

Updated ms.date to reflect freshness review

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[Jak-MS]

@msmbaldwin 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

[PMEds28]

@msmbaldwin

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

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

[v-dirichards]

I sent email to the content owner today.

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

[v-dirichards]

I sent email to the content owner today.

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

[msmbaldwin]

#sign-off