Update books

diff --git a/src/doc/embedded-book b/src/doc/embedded-book
index 0cd2ca116274b915924c3a7e07c1e046b6f19b77..dd310616308e01f6cf227f46347b744aa56b77d9 160000 (submodule)
--- a/src/doc/embedded-book
+++ b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit 0cd2ca116274b915924c3a7e07c1e046b6f19b77
+Subproject commit dd310616308e01f6cf227f46347b744aa56b77d9

diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 19f0a0372af497b34369cf182d9d16156cab2969..7d3ff1c12db08a847a57a054be4a7951ce532d2d 160000 (submodule)
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 19f0a0372af497b34369cf182d9d16156cab2969
+Subproject commit 7d3ff1c12db08a847a57a054be4a7951ce532d2d