update readme

Author: xinntao

README.md

@@ -5,6 +5,7 @@
 GFPGAN is a blind face restoration algorithm towards real-world face images.
 
 ### GFP-GAN: Towards Real-World Blind Face Restoration with Generative Facial Prior
+> [Paper](https://arxiv.org/abs/2101.04061) **|** [Project Page](https://xinntao.github.io/projects/gfpgan) **|** [Demo]() <br>
 > [Xintao Wang](https://xinntao.github.io/), [Yu Li](https://yu-li.github.io/), [Honglun Zhang](https://scholar.google.com/citations?hl=en&user=KjQLROoAAAAJ), [Ying Shan](https://scholar.google.com/citations?user=4oXBp9UAAAAJ&hl=en) <br>
 > Applied Research Center (ARC), Tencent PCG
 

README_CN.md

@@ -5,6 +5,7 @@
 GFPGAN is a blind face restoration algorithm towards real-world face images.
 
 ### GFP-GAN: Towards Real-World Blind Face Restoration with Generative Facial Prior
+> [Paper](https://arxiv.org/abs/2101.04061) **|** [Project Page](https://xinntao.github.io/projects/gfpgan) **|** [Demo]() <br>
 > [Xintao Wang](https://xinntao.github.io/), [Yu Li](https://yu-li.github.io/), [Honglun Zhang](https://scholar.google.com/citations?hl=en&user=KjQLROoAAAAJ), [Ying Shan](https://scholar.google.com/citations?user=4oXBp9UAAAAJ&hl=en) <br>
 > Applied Research Center (ARC), Tencent PCG