Update cobalt from master

boost-commitbot · boost-commitbot · commit 5ccd4a2d9704 · 2023-12-06T06:00:02.000Z
diff --git a/libs/cobalt b/libs/cobalt
@@ -1 +1 @@
-Subproject commit 7884039bf88cfc6ab3fc48a95161ceb6e6bc9375
+Subproject commit 820f9c3906c236e6fd316cba4736c87e16b4eacb
