Update AI model from gpt-5 to gpt-4.1

[narukoshin]

No description provided.

[github-actions]

AI Code Review

1. Sensitive data disclosure

✅ No issues found.

2. Merge conflicts

✅ No issues found.

3. Correctness

✅ No issues found.

• The change updates the model identifier in the workflow as described.

4. Cross-platform

✅ No issues found.

5. Bash quality

✅ No issues found.

• No bash code present in the diff.

6. Security

✅ No issues found.

• No hardcoded secrets or unsafe expansions.

7. Code quality

✅ No issues found.

• The change is minimal, does not introduce magic strings unnecessarily.

8. Dependencies

✅ No issues found.

9. Documentation

🟡 Minor:

• The workflow file was changed, but there is no accompanying update in related documentation if any exists. If there is separate documentation or a README referencing the AI model used for reviews, consider updating that for clarity.

10. PR scope

✅ No issues found.

• Single, focused change.

📝 AI Recommendation: APPROVE WITH NOTES

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AI-generated advisory review. All verdicts are recommendations only — the final merge decision rests with the human maintainer.