[roll] Roll fuchsia [docs][assembly] Add codelab for writing a board config

Original-Bug: 450864418
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1420154
Original-Revision: 1cff64336e1ac1e3fe252eb44da929d8f5ddb43d
GitOrigin-RevId: 2d3e6fb6ec47fd9c82c0797cf1c576b5cae9502f
Change-Id: Ie9f24f224ebd5a3cd7c7bd8beb66e683a8554a4b

stem

diff --git a/stem b/stem
index 28784c7..4065f69 100644
--- a/stem
+++ b/stem
@@ -7,7 +7,7 @@
             manifest="manifests/platform"
             root=""
             remote="https://fuchsia.googlesource.com/fuchsia"
-            revision="9617b2d88e91b135f674b048dc3e06e044984c3a"/>
+            revision="1cff64336e1ac1e3fe252eb44da929d8f5ddb43d"/>
   </imports>
   <projects>
     <project name="cobalt"