Update default model to gpt-4 & add more extensions to file filter

[harjotgill]

Summary by OpenAI

New Feature:

• The default model has been updated to 'gpt-4' in action.yml.
• Additional file extensions have been added to the file filter in action.yml.

🎉 With GPT-4, we take a stride,

In AI's journey, a joyous ride. 🚀

More files now within our sight, 👀

Making our codebase shine so bright! 💡

[github-actions[bot]]

:robot: OpenAI

High-Level Summary

The changeset updates the action.yml file, primarily modifying two aspects. Firstly, it sets the default model to 'gpt-4'. Secondly, it expands the file filter by adding more file extensions.

File	Summary
action.yml	The default model has been updated to 'gpt-4', and additional file extensions have been added to the file filter.

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In the recent run, only the files that changed from the base of the PR and between 9ac127d9e21d898c665f3a7cf12229e5908149d5 and f16afa825957a71ca38972ab89d17694ddd0e747 commits were reviewed.