Update README.md

README.md

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 # HW-GPT-Bench
 ## Repository for [HW-GPT Benchmark](https://arxiv.org/abs/2405.10299)
 ![alt text](figures/overview.png)
-## Supernet Checkpoints
-We release the pretrained supernet checkpoints [here](https://drive.google.com/drive/folders/1-Efori5ou1b4pmGYyFJItoqgqRueGfyv?usp=sharing)
+## Supernet Checkpoints and Pretrained Surrogates
+We release the pretrained supernet checkpoints [here](https://drive.google.com/drive/folders/1-Efori5ou1b4pmGYyFJItoqgqRueGfyv?usp=sharing), the pretrained hardware surrogates [here](https://drive.google.com/file/d/1-HXev4sdoDf_nwDJoBdlK1eKIOFN5K00/view?usp=sharing) and the perplexity surrogates [here](https://drive.google.com/file/d/1-Z998sYUprA5fuogLElQfAYq7Z29XqUg/view?usp=sharing). 
+
 ## To install in editable mode (-e) run:
 
 ```sh