Updates the Stan submodule to d94c86f5a.

stan-buildbot · stan-buildbot · commit bfc2bf8d0d62 · 2024-06-03T10:38:36.000-04:00
diff --git a/stan b/stan
@@ -1 +1 @@
-Subproject commit 3cf3d9ea15705519966ff27f8ceeeaaaa877011f
+Subproject commit d94c86f5a770da6ca7060c247242d14ec277a940
