[roll] Roll fuchsia [diagnostics][reader] Fix await holding lock

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1169484
Original-Revision: 7f160b3ace67137b6e33898777ad453891b55391
GitOrigin-RevId: b09121a5c8429e99f443eb8a26b00ade900ccd2d
Change-Id: Ie412f5efc21bbbc10ca452bae6e1e53aafbaaf72
diff --git a/stem b/stem
index 5e1918e..e3bc624 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="c2976cb8e0bc4ab06121d8bb45bc427980c242ee"/>
+             revision="7f160b3ace67137b6e33898777ad453891b55391"/>
   </projects>
   <hooks>
     <hook name="install-environment"