[roll] Roll fuchsia [starnix] RangeMap keys are Copy.

In practice this was already true, this change makes the
public APIs a little more ergonomic since there's no significant
benefit to passing ranges by reference.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/918638
Original-Revision: b1d8625a48d2093f7a6d3b6ec36c925da0d51ee3
GitOrigin-RevId: 5fa506122671da7a6c61a21a200736508e1ee986
Change-Id: Ic967b8e047b3dd06a4fb2bea746582c08a6dcdeb
diff --git a/stem b/stem
index ef9160f..edf3beb 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="4b93b33796dd1ccda06652e62dfc36657409462c"/>
+             revision="b1d8625a48d2093f7a6d3b6ec36c925da0d51ee3"/>
   </projects>
   <hooks>
     <hook name="install-environment"