Update README.md

README.md

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     <a href="https://scholar.google.com/citations?user=lkWfR08AAAAJ">Michael Felsberg</a>
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-    <a href="https://arxiv.org/abs/2308.08479" align="center">Paper</a> | 
+    <a href="https://arxiv.org/abs/2305.15404" align="center">Paper</a> | 
     <a href="https://parskatt.github.io/RoMa" align="center">Project Page (TODO)</a>
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