Update app.py

app.py

@@ -250,7 +250,7 @@ def main():
     <div style="text-align: center;">
     <div style="display: flex; align-items: center; justify-content: center; gap: 0.5rem; margin-bottom: 0.5rem; font-size: 1rem; flex-wrap: wrap;">
     <a href="https://sam2point.github.io/" target="_blank">[Webpage]</a>
-    <a href="https://github.com/ZiyuGuo99/SAM2Point/blob/main/SAM2Point.pdf" target="_blank">[Paper]</a>
+    <a href="https://arxiv.org/pdf/2408.16768" target="_blank">[Paper]</a>
     <a href="https://github.com/ZiyuGuo99/SAM2Point" target="_blank">[Code]</a>
     </div>
     </div>