Add Job Bench to Model Ranking (Comprehensive)

[Copilot]

This updates the leaderboard catalog by adding the missing Job Bench entry (https://job-bench.github.io/#leaderboard) to the Comprehensive model ranking section. The change keeps the README’s existing table structure and categorization intact.

• What changed

  • Added a new markdown table row under Rankings > Model Ranking > Comprehensive for Job Bench.
  • Included the leaderboard URL and a concise description aligned with adjacent entries.

• README update (excerpt)

| [Job Bench](https://job-bench.github.io/#leaderboard) | Job Bench is a benchmark leaderboard for evaluating AI models on job-related tasks. |

[Copilot]

Pull request overview

This PR updates the leaderboard catalog by adding the missing Job Bench entry to the Rankings > Model Ranking > Comprehensive section in README.md, following the existing markdown table format.

Changes:

• Added a new markdown table row for Job Bench under the Comprehensive model ranking table.
• Included the official leaderboard URL and a short description consistent with adjacent entries.

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