Fix Godbolt which had lingering legacy usage.

PiperOrigin-RevId: 718033579

Author: jwhpryor

README.md

@@ -22,7 +22,7 @@ It requires C++20, or clang enabled at C++17 or later. It is compatible with And
   <a href="https://docs.google.com/presentation/d/1PrpidDPcfbH37GywwzeL78Nd1fseHNEQoYWqbslYvBE/edit?usp=sharing" target="_blank">
     <img src="slides-screenshot.png" width="300" style="margin-right: 20px;">
   </a>
-  <a href="https://godbolt.org/z/rfv4sqbYM" target="_blank">
+  <a href="https://godbolt.org/z/cq97f3Enx" target="_blank">
     <img src="godbolt.png" width="300" style="margin-left: 20px;">
   </a>
 </div>