Update private-endpoint-dns.md - add GCCH managedEnvironments

[Mike-Nahmias]

Add Microsoft.App/ManagedEnvironments - managedEnvironments for GCCH

[prmerger-automator[bot]]

@Mike-Nahmias : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod[bot]]

Learn Build status updates of commit 51d1c4c:

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[v-dirichards]

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

[v-dirichards]

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

Thanks!

[ttorble]

I sent email to the content owner today.

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

[v-ccolin]

I sent an email to the content owner today.

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

[v-dirichards]

@mike-nahmias The article has been substantially updated or deleted, and this change no longer applies. If you'd still like to update the article, please open a new PR. Or if you believe this PR was closed by mistake, email the PublicPRs alias.

#please-close @MicrosoftDocs/public-repo-pr-review-team