Use preprint DOI URL

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@@ -43,7 +43,7 @@ <h2>About</h2>
 <div id="features" class="section">
     <h2>Features</h2>
     <center>
-    <a href="https://www.biorxiv.org/content/10.1101/2024.05.24.595648v2"><img src="https://img.shields.io/badge/Paper-bioRxiv-green" style="max-width: 100%;"></a>
+    <a href="https://doi.org/10.1101/2024.05.24.595648"><img src="https://img.shields.io/badge/Paper-bioRxiv-green" style="max-width: 100%;"></a>
     <a href="https://huggingface.co/SaProtHub"><img src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-red?label=SaprotHub" style="max-width: 100%;"></a>
     <a href="https://colab.research.google.com/github/westlake-repl/SaprotHub/blob/main/colab/SaprotHub.ipynb"><img src="templates/figures/colab-badge.svg" style="max-width: 100%;"></a>
     <a href="https://cbirt.net/no-coding-required-saprothub-brings-protein-modeling-to-every-biologist/" alt="blog"><img src="https://img.shields.io/badge/Blog-Medium-purple" /></a>