Fix in librarian.

diff --git a/lib/librarian b/lib/librarian
index 2a4236f..a91e41e 160000 (submodule)
--- a/lib/librarian
+++ b/lib/librarian
@@ -1 +1 @@
-Subproject commit 2a4236f2ddbe95d07ba7fcbe750451340c38c2b9
+Subproject commit a91e41e489588ebad550cd9e22d157062effa2ff