docs: swap the DDoS tier descriptions

[loicbs]

The descriptions for DDoS IP Protection and DDoS Network Protection appear to be swapped. This update aligns them with the Azure DDoS Protection Tier Comparison and the rest of the file.

[prmerger-automator]

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[learn-build-service-prod]

Learn Build status updates of commit 94b6ff7:

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File	Status	Preview URL	Details
articles/ddos-protection/ddos-protection-overview.md	✅Succeeded

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[Copilot]

Pull Request Overview

This PR corrects the swapped descriptions for Azure DDoS Protection tiers by reordering the sections and updating their content to match the official Azure documentation. The descriptions for DDoS IP Protection and DDoS Network Protection were incorrectly positioned, leading to confusing documentation.

• Swapped the order of DDoS IP Protection and DDoS Network Protection sections
• Updated the descriptions to accurately reflect each tier's features and pricing model
• Corrected the cross-references to appropriate quickstart guides for each protection type

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