[Clang] Update cxx_status

Author: Sirraide

clang/www/cxx_status.html

@@ -197,7 +197,7 @@ <h2 id="cxx26">C++2c implementation status</h2>
  <tr>
   <td><tt>= delete("should have a reason");</tt></td>
   <td><a href="https://wg21.link/P2573R2">P2573R2</a></td>
-  <td class="none" align="center">No</td>
+  <td class="unreleased" align="center">Clang 19</td>
  </tr>
  <tr>
   <td>Variadic friends</td>