[roll] Roll fuchsia [superproject] Roll cobalt-registry [connectivity_wlan] Connect and disconnect histograms

Adds histogram reports to the (dis-)connect metrics. This allows us to
see how our (dis-)connects are distributed across the population.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/1155413
Privacy-Approval: Francois Rousseau <frousseau@google.com>
Original-Revision: d3c9c131e8ff4fb2d7b327ccc7fd984cc2f1b93c
GitOrigin-RevId: d63edd4f3a8ce121fe9fa1001e42036e933bcc64
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1157129
Original-Revision: f9031f738e97537ab4df87b7a9c2547d87e16ba5
Change-Id: I944b74c708375949f2af74c8cf8c94c35d0ab5e8
diff --git a/stem b/stem
index 0355b21..616ec4b 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="89306d330a857e7d199bd1573c96880109876431"/>
+             revision="f9031f738e97537ab4df87b7a9c2547d87e16ba5"/>
   </projects>
   <hooks>
     <hook name="install-environment"