images in PDF

diff --git a/lib/librarian b/lib/librarian
index fc7a836..6b75d94 160000 (submodule)
--- a/lib/librarian
+++ b/lib/librarian
@@ -1 +1 @@
-Subproject commit fc7a8368b6033616780d563149d78db33b6b91a3
+Subproject commit 6b75d94412c089b10bd7637b1008bdaf9057a440