Upgrade PostCSS to 8.4.49 for AI Verify 2.0

[imda-benedictlee]

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Description

Fixes Vulnerabilities found in underlying dependency (Nanoid) in PostCSS.

BDSA Link: https://blackduck.aipo-imda.net/api/vulnerabilities/BDSA-2024-10360/overview

Current Behavior

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Expected Behavior

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Steps To Reproduce

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Environment

- Operating System and Version:
- AI Verify Version:
- Any other relevant information (e.g. version of related package dependencies installed):

Did you build using source code or from docker file? If from source code, please provide the below information:
- Python Version:
- Node Version:
- Redis Version:
- Mongo Version: 
- Screen Resolution:

Screenshots/ Code snippets

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Additional Context

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Possible Solution (Optional)

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