Fix mirai classification and TOC

[von-development]

• Reclassify MIRAI from Energy to Geopolitics.
• Update description to: “Evaluates LLM agents for international relations forecasting.”
• Fix Table of Contents anchors.

Why:
MIRAI benchmarks LLM agents for forecasting international events (news + GDELT), not energy demand.

Refs:

• Repo: https://github.com/yecchen/MIRAI
• Paper (arXiv): https://arxiv.org/abs/2407.01231