Update Upcoming Breaking Changes doc

[azclibot]

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[learn-build-service-prod]

PoliCheck Scan Report

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[learn-build-service-prod]

Learn Build status updates of commit 15b32bb:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
docs-ref-conceptual/Latest-version/upcoming-breaking-changes.md	⚠️Warning	View (azure-cli-latest)	Details

docs-ref-conceptual/Latest-version/upcoming-breaking-changes.md

• Line 350, Column 3: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/migrate-blueprint' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 350, Column 3: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/migrate-blueprint' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[mikefrobbins]

LGTM