Update create-server-audit-transact-sql.md

[oberdansch]

Added retention period

[prmerger-automator]

@oberdansch : 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 ef45f5e:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/t-sql/statements/create-server-audit-transact-sql.md	✅Succeeded

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[ktoliver]

@sravanisaluru

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

[learn-build-service-prod]

Learn Build status updates of commit b0b1395:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/relational-databases/system-catalog-views/sys-server-file-audits-transact-sql.md	✅Succeeded
docs/t-sql/statements/create-server-audit-transact-sql.md	✅Succeeded

For more details, please refer to the build report.

[sravanisaluru]

the changes good to go

[sravanisaluru]

#sign-off

[rwestMSFT]

#hold-off

[rwestMSFT]

Thanks @sravanisaluru. I need to incorporate these changes into an internal PR because the article is due for a freshness pass.

@oberdansch When the internal PR is merged, this PR will automatically close. You should retain contributor credit, and it will take about a business day to see the updated article.