[Doc] Add two papers to Awesome Paper List (dmlc#3208)

* PPIDataset

* Revert "PPIDataset"

This reverts commit 264bd0c.

* data pipeline user guide

* remove chapter numbers

* Update data.rst

* image in dataset userguide

* update links using ref

* modify the link of save_graphs and load_graphs in dataset user guide

* move image to s3 server.

* fix links and ref

* Hide implementations that may cause confusions to the user

* add papers

* fix number of classes in Amazon Cobuy datasets

* add two papers to Awesome paper list

* Update README.md

* add four papers

* add two papers

* Add awesome papers

* Fix index in paper list

* Add paper to paperlist

* add two papers

* add two papers

* Update README.md

Co-authored-by: Minjie Wang <[email protected]>

README.md

@@ -275,6 +275,10 @@ Take the survey [here](https://forms.gle/Ej3jHCocACmb49Gp8) and leave any feedba
 
 1. [**Covid-19 Detection from Chest X-ray and Patient Metadata using Graph Convolutional Neural Networks**](https://arxiv.org/abs/2105.09720), *Thosini Bamunu Mudiyanselage, Nipuna Senanayake, Chunyan Ji, Yi Pan, Yanqing Zhang*
 
+1. [**Graph neural networks and sequence embeddings enable the prediction and design of the cofactor specificity of Rossmann fold proteins**](https://www.biorxiv.org/content/10.1101/2021.05.05.440912v2), bioRxiv'21, *Kamil Kaminski, Jan Ludwiczak, Maciej Jasinski, Adriana Bukala, Rafal Madaj, Krzysztof Szczepaniak, Stanislaw Dunin-Horkawicz*
+
+1. [**LGESQL: Line Graph Enhanced Text-to-SQL Model with Mixed Local and Non-Local Relations**](https://arxiv.org/pdf/2106.01093.pdf), ACL'21, *Ruisheng Cao, Lu Chen, Zhi Chen, Yanbin Zhao, Su Zhu, Kai Yu*
+
 </details>
 
 ## Contributing