:art: small fix

diff --git a/ast b/ast
index 201d9dda93302a6a23a7ffd01258cb40abb94445..91bc85b8a29566ffcd055b6912629533ea45f55b 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 201d9dda93302a6a23a7ffd01258cb40abb94445
+Subproject commit 91bc85b8a29566ffcd055b6912629533ea45f55b