[roll] Roll fuchsia [superproject] Roll third_party/pigweed pw_rust: Place top level rules into a group within pw_rust

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/138332
Original-Revision: ce3e1280fcac0461258874eea3e917f6b30be573
GitOrigin-RevId: 6d5fa456d0d558760aba22025efb620c30b2c45a
Roller-URL: https://ci.chromium.org/b/8779332097043228609
CQ-Do-Not-Cancel-Tryjobs: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/865837
Original-Revision: 3f93e40c29ec27f176b0d473c55ecf581641d560
Change-Id: Iaf680cfeab199611eb083463c25166f0ce17649d
diff --git a/stem b/stem
index 32e81ff..f22b75f 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="e607cc3ea3e3039977534eed67c447056c834dc7"/>
+             revision="3f93e40c29ec27f176b0d473c55ecf581641d560"/>
   </projects>
   <hooks>
     <hook name="install-environment"