build(submodule): bump commit

amejiarosario · amejiarosario · commit f7fcd7e23d5d · 2019-05-08T12:35:23.000-04:00
diff --git a/book/config b/book/config
@@ -1 +1 @@
-Subproject commit b9828dbf0eb543e36bfcb16251a759a473e8c7db
+Subproject commit 3a88d8e993610a5debad67fd591364e37680b485
