diff --git a/doc b/doc
index 973946e..7021fdd 160000
--- a/doc
+++ b/doc
@@ -1 +1 @@
-Subproject commit 973946eb32704b6611a616573e2e5411aec5350b
+Subproject commit 7021fdd90ea0dea22b677f26404ac54190baec93