Updates the Stan submodule to 4df96e20a.

stan-buildbot · stan-buildbot · commit a56f5276f6d2 · 2025-06-07T00:53:49.000-04:00
diff --git a/stan b/stan
@@ -1 +1 @@
-Subproject commit 1110753f450dc729808c0772bf32fe727cc54575
+Subproject commit 4df96e20a007315097e6a86763b009a9e049b30f
