[roll] Roll fuchsia [build] Add Sorrel to testing environments.

Original-Bug: 355507826
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1143138
Original-Revision: ffd38d95ea86b6c151684b8cbe3eb458e40c9429
GitOrigin-RevId: 1dea5ab4c3a5f0f3c9347b04038c28bad415d5b5
Change-Id: I31b072edc504b63608ace504471f4bdcb883a82e
diff --git a/stem b/stem
index 38bf3c8..9b25308 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="a7f5f23dc6f3dbb63ecab5c966f42920e2cc5b41"/>
+             revision="ffd38d95ea86b6c151684b8cbe3eb458e40c9429"/>
   </projects>
   <hooks>
     <hook name="install-environment"