docs: add changelog

CHANGELOG.md

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+# 0.1.0
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+- We identified that the insurance policy data used in the Vidore V2 leaderboard falls within a grey area of licensing. While the data was publicly accessible, its licensing terms were not sufficiently clear to ensure compliance with our data usage standards. We have since removed this benchmark data from HuggingFace and removed the concerned columns from the leaderboard.