Add web app deployment slots to private-endpoint-dns.md

[Mike-Nahmias]

Adding private endpoint details for (Microsoft.Web/sites/slots)

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[ttorble]

@AbdullahBell

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"
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[PMEds28]

I sent an email to the content owner today.

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[ttorble]

I sent a Teams message to the content owner today.

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[AbdullahBell]

Hello, thank you for your contribution to the docs! This PR is under review

[v-ccolin]

I sent an email to the content owner today.

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[ttorble]

I sent a Teams message to the content owner today.

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[v-dirichards]

@AbdullahBell - Would you add a comment to indicate what action to take on this PR?

Thanks!

[v-dirichards]

I sent an email to the content owner today.

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[Copilot]

Pull Request Overview

This PR adds private endpoint DNS configuration details for Azure Web Apps deployment slots to the private endpoint DNS documentation. Deployment slots are a feature that allows staging and testing of web applications before production deployment.

• Added entries for Azure Web Apps deployment slots in both public Azure and Azure Government cloud tables
• Added explanation for the {slotName} placeholder variable used in the subresource naming

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