Updates prezto

diff --git a/prezto b/prezto
index e455514100092e85d2adaa4771ccaea650b5f9df..b97f6a272cf409cd88b84e3845e196f3ea4f6525 160000 (submodule)
--- a/prezto
+++ b/prezto
@@ -1 +1 @@
-Subproject commit e455514100092e85d2adaa4771ccaea650b5f9df
+Subproject commit b97f6a272cf409cd88b84e3845e196f3ea4f6525