Update tutorial-enable-customer-managed-keys.md

[mcrilly]

Add location flag to create the key vault

[prmerger-automator]

@mcrilly : 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 1f97e4f:

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articles/container-registry/tutorial-enable-customer-managed-keys.md	✅Succeeded

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[v-regandowner]

@rayoef - 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

[github-actions]

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[v-dirichards]

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

Thanks!

[github-actions]

This pull request has been inactive for at least 14 days. If you are finished with your changes, don't forget to sign off. See the contributor guide for instructions.
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Resolve Merge Conflict

[v-dirichards]

@rayoef

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 <a Teams message to the content owner today.

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