Add Riiid/sheep-duck-llama-2 to eval queue

Riiid/sheep-duck-llama-2_eval_request_False_float16_Original.json

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+{"model": "Riiid/sheep-duck-llama-2", "base_model": "meta-llama/Llama-2-70b-hf", "revision": "main", "private": false, "precision": "float16", "weight_type": "Original", "status": "PENDING", "submitted_time": "2023-09-06T04:14:02Z", "model_type": "\ud83d\udd36 : fine-tuned"}