Updates the Stan submodule to 42731ba4f.

stan-buildbot · stan-buildbot · commit 564cf3b1b174 · 2024-11-29T14:15:27.000-05:00
diff --git a/stan b/stan
@@ -1 +1 @@
-Subproject commit 185f36832fa3fa8a04ba8c23640aa54d2691b13b
+Subproject commit 42731ba4f29b0db0daf884df24e935b1fe877eff
