chore: update comments for pathinfo

[chenjiahan]

Summary

Updated comment to clarify why pathinfo is disabled, referencing Rspack's moduleId behavior in development mode.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull Request Overview

This PR updates the comment explaining why pathinfo is disabled in the webpack/Rspack output configuration. The change clarifies that the reason is not primarily about performance, but rather because Rspack's moduleId already includes path information in development mode, making the additional path info redundant and reducing output cleanliness.

• Updated comment to better reflect the actual reason for disabling pathinfo in Rspack

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