Updates the Stan submodule to f795b8831.

stan-buildbot · stan-buildbot · commit d667d7b5b9fe · 2025-11-24T22:13:27.000-05:00
diff --git a/StanHeaders/inst/include/upstream b/StanHeaders/inst/include/upstream
@@ -1 +1 @@
-Subproject commit 2389b6ada036bcda572ff05357ba4c1605c31c4c
+Subproject commit f795b88315d02db24845a0958ddd779fb9a99499
