Readme - Fix Paper Link

There seems to have been a small typo in the link for the paper, resulting in a 404 on GitHub.

README.md

@@ -28,7 +28,7 @@ Paper: [arXiv:2407.20267](https://arxiv.org/abs/2407.20267)
 
 This repository provides PyTorch source code associated with our publication, "A Large Encoder-Decoder Family of Foundation Models for Chemical Language".
 
-Paper: [Arxiv Link](https://github.com/IBM/materials/blob/main/smi-ted/paper/smi_ted_preprint.pdf)
+Paper: [Arxiv Link](https://github.com/IBM/materials/blob/main/smi-ted/paper/smi-ted_preprint.pdf)
 
 We provide the model weights in two formats: