Update secured-hub-customer-public-ip.md

[cgoenka1]

Removed the capability which was contradicting.

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articles/firewall/secured-hub-customer-public-ip.md	✅Succeeded

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[Copilot]

Pull Request Overview

This PR resolves a contradiction in the documentation about customer-provided public IP addresses for Azure Firewall in Virtual WAN secured hubs. The changes remove conflicting information and improve clarity about deployment availability.

• Removes contradictory statement about new deployment limitations
• Clarifies that the feature is available for both new and existing deployments
• Improves grammar and readability in the feature description

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[ttorble]

@duongau

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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