clarify that old hunk was replaced

[harjotgill]

Summary by OpenAI

Release Notes:

• Refactor: Update code review instructions and response format for clarity and consistency.

"Code review made easy,
Instructions clear, response format breezy.
Bugs and issues, we'll catch them all,
Thanks to this PR, we stand tall."

[github-actions]

🤖 OpenAI

Overall, the changes made in this pull request are focused on improving the clarity and consistency of the code review process. The modifications include updating the instructions for code review, modifying the format for changes, removing unnecessary context, and updating the response format expected. These changes will improve the maintainability and modularity of the codebase.

File	Summary
action.yml	The changes made to action.yml only clarify that an old hunk was replaced. No other changes were made to the file.
src/review.ts	The changes made to src/review.ts update the instructions for code review, modify the format for changes, remove unnecessary context, and update the response format expected.

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