[doc] fix requirements typo for issue #3125

[Suffoquer-fang]

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🚨 Issue number

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fixed #3125

📝 What does this PR do?

fix the typo in requirements.txt:
transformers >= 4.231
to
transformers >= 4.23.1

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[binmakeswell]

Hi @Suffoquer-fang Thanks so much for your contribution!