Update GPT metric prompt

[Kunlun-Zhu]

Closes #

📑 Description

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed
• Branch name follows type/descript (e.g. feature/add-llm-agents)
• Ready for code review

ℹ Additional Information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.15%. Comparing base (159a725) to head (1077d91).
Report is 31 commits behind head on main.

@@           Coverage Diff           @@
##             main     #914   +/-   ##
=======================================
  Coverage   70.15%   70.15%           
=======================================
  Files          80       80           
  Lines        3569     3569           
=======================================
  Hits         2504     2504           
  Misses       1065     1065           

Files with missing lines	Coverage Δ
research_bench/eval.py	0.00% <ø> (ø)

[lwaekfjlk]

we do not use this metric anymore. abort.