diff --git a/doc b/doc
index 7cde9d4..51fe7c4 160000
--- a/doc
+++ b/doc
@@ -1 +1 @@
-Subproject commit 7cde9d4949aa325821a152efdf79cafcd50b8239
+Subproject commit 51fe7c4d90ec4aee4761cf46ada5c3989a3d746d