[roll] Roll fuchsia [artifactory] Add a -namespace flag

This will eventually replace the `-uuid` flag (see bug for renaming
rationale), but for now we need to keep supporting the `-uuid` flag to
avoid breaking recipes.

Original-Bug: 75201
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/519722
Original-Revision: 46608a49964bf97c8db581e8c0986d204260e583
GitOrigin-RevId: 4947f290f35946b4c21fac038e10ba2d71b28ded
Change-Id: Idf305764764ef6a4d3fcd95a7e3e4935ddb10b6c
diff --git a/stem b/stem
index 57df4d8..a8d821f 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="51e54f5565476366b7f60a7215867066420b2d58"/>
+             revision="46608a49964bf97c8db581e8c0986d204260e583"/>
   </projects>
   <hooks>
     <hook name="install-environment"