add colab link

Author: yqzhishen

README.md

@@ -2,9 +2,9 @@
 [![arXiv](https://img.shields.io/badge/arXiv-Paper-<COLOR>.svg)](https://arxiv.org/abs/2105.02446)
 [![GitHub Stars](https://img.shields.io/github/stars/MoonInTheRiver/DiffSinger?style=social)](https://github.com/MoonInTheRiver/DiffSinger)
 [![downloads](https://img.shields.io/github/downloads/MoonInTheRiver/DiffSinger/total.svg)](https://github.com/MoonInTheRiver/DiffSinger/releases)
+ | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1kfmZ6Y018c5trSwQAbhdQtZ7Il8W_4BU)
  | [Interactive🤗 TTS](https://huggingface.co/spaces/NATSpeech/DiffSpeech)
  | [Interactive🤗 SVS](https://huggingface.co/spaces/Silentlin/DiffSinger)
- | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1kfmZ6Y018c5trSwQAbhdQtZ7Il8W_4BU)  
 
 
 This repository is the official PyTorch implementation of our AAAI-2022 [paper](https://arxiv.org/abs/2105.02446), in which we propose DiffSinger (for Singing-Voice-Synthesis) and DiffSpeech (for Text-to-Speech).