Add brief explanation for CNAME records

[feliasson]

• I wanted to link our internal docs related to Azure Private Links and that CNAMEs are used in the process but MS Learn didn't include any explanation what they actually are used for.

[prmerger-automator]

@feliasson : 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 b96a3d8:

✅ Validation status: passed

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articles/dns/dns-zones-records.md	✅Succeeded

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[Copilot]

Pull request overview

Note

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Adds a short explanation of what CNAME records do, improving DNS record documentation context (notably for scenarios like Azure Private Link workflows).

Changes:

• Added a one-sentence definition of CNAME records in the DNS zones/records documentation.

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[v-dirichards]

@asudbring

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 86c9358:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/dns/dns-zones-records.md	✅Succeeded

For more details, please refer to the build report.