Add Amphion NaturalSpeech2 to evaluation queue

amphion_naturalspeech2.json

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+{"model_name": "Amphion NaturalSpeech2", "display_name": "[Amphion NaturalSpeech2 ](https://github.com/open-mmlab/Amphion/tree/main/egs/tts/NaturalSpeech2) [\ud83e\udd17](https://huggingface.co/spaces/amphion/NaturalSpeech2)[\ud83d\udcbb](https://github.com/open-mmlab/Amphion/tree/main/egs/tts/NaturalSpeech2)[\ud83d\udcc4](https://arxiv.org/abs/2304.09116)", "model_tags": ["Reference-based (Speaker)", "Prosodic Correlates", "Diffusion", "Audio Tokens", "Non-autoregressive"], "web_url": "https://github.com/open-mmlab/Amphion/tree/main/egs/tts/NaturalSpeech2", "hf_url": "https://huggingface.co/spaces/amphion/NaturalSpeech2", "code_url": "https://github.com/open-mmlab/Amphion/tree/main/egs/tts/NaturalSpeech2", "paper_url": "https://arxiv.org/abs/2304.09116", "inference_details": "", "status": "pending"}