Fix typo

[changeworld]

Azure container registry -> Azure Container Registry

[prmerger-automator]

@changeworld : 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 dffbb67:

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docs/azure/end-to-end-deployment-entity-framework-core-github-actions.md	✅Succeeded
docs/containers/container-tools-react.md	✅Succeeded
docs/containers/container-tools.md	✅Succeeded
docs/containers/hosting-web-apps-in-docker.md	✅Succeeded
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[ttorble]

@ghogen and @alexwolfmsft

Can you review the proposed changes? Note that the style guide says: "Lowercase when referring to an instance of using the service: container registry."

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]

@ghogen I'll merge this PR based on your approval. If this article requires further changes, please open a separate pull request.