[roll] Roll fuchsia [submodules] Update submodule pins

This change synchronizes submodule revisions with Jiri manifest state.
These revisions have no bearing on Fuchsia builds or local checkouts
and are only used by Code Search.

If you wish to update a repository's revision, update the corresponding
Jiri manifest and the change will automatically be synchronized to
submodules.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1258029
Original-Revision: 65936804dd7330e7493abfa24fe619d56b12891b
GitOrigin-RevId: f37c12bf2a497b65a6c3ad3a836c3c6b054e0948
Change-Id: Ie3cb653e11199714bc05d0d6b66a3f3618d76ab6

stem

diff --git a/stem b/stem
index 5f5bae3..857c146 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="728015e0e9de506da5db26abffcbe75fa7b31db7"
+             revision="65936804dd7330e7493abfa24fe619d56b12891b"
              />
   </projects>
   <hooks>