[wwwdocs] Document support for znver4 in gcc-13/changes.html

[Martin Jambor]

Hello,

is the following item documenting that gcc13 can generate code for Zen 4
OK for the changes.html file on the web?

Thanks,

Martin


diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html
index 4fae1f7a..f8e9560c 100644
--- a/htdocs/gcc-13/changes.html
+++ b/htdocs/gcc-13/changes.html
@@ -530,6 +530,10 @@ a work-in-progress.</p>
     <code>-march=graniterapids</code>.
     The switch enables the AMX-FP16 and PREFETCHI ISA extensions.
   </li>
+  <li>GCC now supports AMD CPUs based on the <code>znver4</code> core
+    via <code>-march=znver4</code>.  The switch makes GCC consider
+    using 512 bit vectors when auto-vectorizing.
+  </li>
 </ul>
 
 <!-- <h3 id="mips">MIPS</h3> -->