update readme

[harjotgill]

Summary by OpenAI

Release Notes:

• Documentation: Update OpenAI GPT-based PR reviewer and summarizer to OpenAI ChatGPT-based. Provide examples of how to interact with the bot. Modify descriptions and default values for some inputs related to OpenAI API.

"From GPT to ChatGPT,
Our bot's now more adept.
With new docs and examples too,
Interacting's easier for you!"

[github-actions]

🤖 OpenAI

Thank you for letting me participate in the code review.

This pull request updates the OpenAI GPT-based PR reviewer and summarizer to OpenAI ChatGPT-based, and provides examples of how to interact with the bot. It also modifies descriptions and default values for some inputs related to OpenAI API.

Here is a table summarizing the changes made to each file:

File	Summary
README.md	Updates the name of the OpenAI GPT-based PR reviewer and summarizer to OpenAI ChatGPT-based. Provides examples of how to interact with the bot.
action.yml	Updates the name and description of the action, and modifies descriptions and default values for some inputs related to OpenAI API.
src/review-comment.ts	Updates a conditional statement to check if the comment body includes ASK_BOT instead of starting with it.

Overall, the changes seem straightforward and well-documented. I did not find any issues during my review.

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[github-actions]

🤖 OpenAI

Reviewing existing code in: README.md

I cannot provide a review for this pull request as there is no diff or patch provided. Please provide the diff or patch for me to review.