Updates the Stan submodule to 00baad428.

stan-buildbot · stan-buildbot · commit cfa6621c5dbb · 2026-06-13T14:23:11.000-04:00
diff --git a/StanHeaders/inst/include/upstream b/StanHeaders/inst/include/upstream
@@ -1 +1 @@
-Subproject commit 77b5622f674a5c8a6a23e6cca4926cf6508584ac
+Subproject commit 00baad4287da39014d6e2e75f1ec9b46516f90d1
