[roll] Roll fuchsia [bazel_sdk][publish] Fix repository server.

Use `ffx --machine json repository server status` to check whether the
repository server is running rather than
`ffx config get repository.server.enabled`.

It seems the latter can report true even when the repository server is
actually stopped, leading to us trying to publish + register the package
server without starting the package server first.

Original-Bug: 373930507
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1139652
Original-Revision: 8bde2347b651a2829285208282e4a79f8f9f6e71
GitOrigin-RevId: 9aa408353ab9959dac7a6051df00b01ad5b0043e
Change-Id: I8ac0d51e94a8d5e1b2d7ec00883ba446f86eb85a
diff --git a/stem b/stem
index 781de5b..4ec18ce 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="97f181a1229c0f3d55d263378ce343b41199078a"/>
+             revision="8bde2347b651a2829285208282e4a79f8f9f6e71"/>
   </projects>
   <hooks>
     <hook name="install-environment"