Correct link to Haskell Symposium 2024

Author: lkuper

site/haskell-symposium/index.html

@@ -109,7 +109,7 @@ <h2>Past Haskell Workshops and Symposia</h2>
 <tr>
   <td><br></td>
   <td>2024</td>
-  <td><a href="2023/index.html">Milan</a></td>
+  <td><a href="https://icfp24.sigplan.org/home/haskellsymp-2024">Milan</a></td>
   <td><a href="https://dl.acm.org/doi/proceedings/10.1145/3677999">Proceedings (ACM DL)</a></td> 
   <td>J. Garrett Morris</td>
   <td>Matthew Pickering</td>