Add EleutherAI/gpt-neox-20b to eval queue

EleutherAI/gpt-neox-20b_eval_request_False_False_False.json

@@ -0,0 +1 @@
+{"model": "EleutherAI/gpt-neox-20b", "base_model": "", "revision": "main", "private": false, "8bit_eval": false, "is_delta_weight": false, "status": "PENDING", "submitted_time": "2023-07-19T21:51:59Z"}