Fix Azure-functions: update default ExtensionBundle to [4.0.0, 5.0.0)

[PreetiYadav1991]

Summary

Update the default Azure Functions extensionBundle range used in the generated host.json from:

[3.*, 4.0.0)

to:

[4.0.0, 5.0.0)

No behavioral changes beyond the default host.json content.

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File Changed

extensions/azure-functions/deployment/src/main/java/io/quarkus/azure/functions/deployment/AzureFunctionsProcessor.java

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Rationale

This change prevents Azure Portal warnings about deprecated bundles and aligns the default with current Microsoft guidance for Azure Functions v4.

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What Changed

In AzureFunctionsProcessor, the extensionBundle.version string emitted into host.json was updated:

• Before: "[3.*, 4.0.0)"
• After: "[4.0.0, 5.0.0)"

No other behavioral changes were introduced.

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Backport Request

This is a small, low-risk default update that improves the user experience for new applications.

Please backport to:

• 3.32.x
• 3.33 (LTS)

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Linked Issues

Fixes #50504