Updates the Stan submodule to 8fbfd798f.

stan-buildbot · stan-buildbot · commit 56d4bff570fe · 2024-05-21T04:00:50.000-04:00
diff --git a/stan b/stan
@@ -1 +1 @@
-Subproject commit 8cbd2f225882df7167ebce76da8ab3224171e4b3
+Subproject commit 8fbfd798f127d99b1882aa2216942ca1966b1c99
