fix(chat): Fix chat completions API error

[fangyinc]

Description

Closes #2439

How Has This Been Tested?

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Checklist:

• My code follows the style guidelines of this project
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• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[Aries-ckt]

r+

[yyhhyyyyyy]

LGTM