Updates the Math submodule to 09542d0bee.

stan-buildbot · stan-buildbot · commit 066164d3e369 · 2025-07-01T08:29:59.000-04:00
diff --git a/lib/stan_math b/lib/stan_math
@@ -1 +1 @@
-Subproject commit bdd5b3ed4e54666590f5eb6fb6e822f1099da01b
+Subproject commit 09542d0beef76139c8d3df580535cae80cfb0191
