Update deprecated packages & API calls

[Seongbuming]

Issue #, if available:

Description of changes:

• Updated package name from sklearn to scikit-learn due to the deprecation of sklearn.
• Replaced deprecated OpenAI API methods with their latest versions.
• Replaced GPT-3 with GPT-3.5 in response to the deprecation of GPT-3.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.