[NFC][Clang] Update P2718R0 implementation status to partial supported (#90577)

Once #85613 fixed, we can
mark this feature fully supported.

Signed-off-by: yronglin <[email protected]>

Author: yronglin

clang/www/cxx_status.html

@@ -167,7 +167,7 @@ <h2 id="cxx26">C++2c implementation status</h2>
  <tr>
   <td>Disallow Binding a Returned Glvalue to a Temporary</td>
   <td><a href="https://wg21.link/P2748R5">P2748R5</a></td>
-  <td class="full" align="center">Clang 19</td>
+  <td class="unreleased" align="center">Clang 19</td>
  </tr>
  <tr>
   <td>Clarifying rules for brace elision in aggregate initialization</td>
@@ -462,7 +462,14 @@ <h2 id="cxx23">C++23 implementation status</h2>
     <tr>
       <td>Lifetime extension in range-based for loops</td>
       <td><a href="https://wg21.link/P2718R0">P2718R0</a></td>
-      <td class="unreleased" align="center">Clang 19</td>
+      <td class="partial" align="center">
+        <details>
+          <summary>Clang 19 (Partial)</summary>
+            The lifetime extension of temporaries bound to member references
+            by default member initializers in aggregate initialization was 
+            not supported now.
+        </details>
+      </td>
     </tr>
     <!--Issaquah 2023 papers-->
     <tr>