Add information on how to improve Auto-GPT with agbenchmark

[waynehamadi]

Background

agbenchmark makes it simpler to improve Auto-GPT

Changes

• explained how to use agbenchmark and where to get more info

Documentation

Test Plan

PR Quality Checklist

• My pull request is atomic and focuses on a single change.
• I have thoroughly tested my changes with multiple different prompts.
• I have considered potential risks and mitigations for my changes.
• I have documented my changes clearly and comprehensively.
• I have not snuck in any "extra" small tweaks changes.
• I have run the following commands against my code to ensure it passes our linters:

  black .
  isort .
  mypy
  autoflake --remove-all-unused-imports --recursive --ignore-init-module-imports --ignore-pass-after-docstring autogpt tests --in-place

[netlify]

❌ Deploy Preview for auto-gpt-docs failed.

Name	Link
🔨 Latest commit	126b627
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/64c92e95465217000823747d

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (ad18f77) 51.95% compared to head (9e85b55) 51.95%.
Report is 1 commits behind head on master.

❗ Current head 9e85b55 differs from pull request most recent head 126b627. Consider uploading reports for the commit 126b627 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5056   +/-   ##
=======================================
  Coverage   51.95%   51.95%           
=======================================
  Files         116      116           
  Lines        4987     4987           
  Branches      671      671           
=======================================
  Hits         2591     2591           
  Misses       2198     2198           
  Partials      198      198           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

Comments addressed