update headers for bernoulli_logit_lpmf

Author: SteveBronder

stan/math/prim/prob/bernoulli_logit_lpmf.hpp

@@ -8,6 +8,7 @@
 #include <stan/math/prim/fun/exp.hpp>
 #include <stan/math/prim/fun/log1p.hpp>
 #include <stan/math/prim/fun/max_size.hpp>
+#include <stan/math/prim/fun/promote_scalar.hpp>
 #include <stan/math/prim/fun/size_zero.hpp>
 #include <stan/math/prim/fun/to_ref.hpp>
 #include <stan/math/prim/fun/value_of.hpp>