[wwwdocs] Document support for C++23 constexpr std::unique_ptr

[Jonathan Wakely via Gcc-patches]

Pushed to wwwdocs.

---
 htdocs/gcc-12/changes.html | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html
index 4f904bfd..78b7b05f 100644
--- a/htdocs/gcc-12/changes.html
+++ b/htdocs/gcc-12/changes.html
@@ -467,11 +467,13 @@ function Multiply (S1, S2 : Sign) return Sign is
   <li>Monadic operations for <code>std::optional</code>.</li>
   <li><code>std::move_only_function</code></li>
   <li><code>&lt;spanstream&gt;</code></li>
-  <li><code>std::invoke_r</code></li>
   <li><code>std::basic_string::resize_and_overwrite</code></li>
+  <li><code>std::unique_ptr</code>
+      can be used in <code>constexpr</code> functions.</li>
   <li><code>&lt;stacktrace&gt;</code>
       (not built by default, requires linking to an extra library).</li>
   <li><code>&lt;stdatomic.h&gt;</code></li>
+  <li><code>std::invoke_r</code></li>
   <li><code>constexpr std::type_info::operator==</code></li>
   </ul>
 </li>
-- 
2.34.1