Updates the Math submodule to f4c6817.

stan-buildbot · stan-buildbot · commit e043da755169 · 2022-11-03T11:26:59.000-04:00
diff --git a/lib/stan_math b/lib/stan_math
@@ -1 +1 @@
-Subproject commit 4d48730cde2f8e7cd420c8227b49433153196d46
+Subproject commit f4c68170c1f1e9bc1284520560204ea9e76c62cd
