[roll] Roll fuchsia [connectivity][rust] Fix incorrect doc comments

Because these aren't documenting any items, these should be regular
comments instead of doc comments.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/912672
Original-Revision: b221b8c4d8a2ec222f45385ade06606a421626c4
GitOrigin-RevId: c6b4781d99d938e575bf3c6807d109a2b3cacfeb
Change-Id: I01d5545a7df195759951293a7ba007d743b44341
diff --git a/stem b/stem
index f7dc0bb..219c983 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="f01a3f9b44ccc4269d7f39d4a73a1657fcad3dd1"/>
+             revision="b221b8c4d8a2ec222f45385ade06606a421626c4"/>
   </projects>
   <hooks>
     <hook name="install-environment"