[roll] Roll fuchsia [gndoc] Update GN build arguments documentation

Roller-URL: https://ci.chromium.org/b/8782081809881347713
CQ-Do-Not-Cancel-Tryjobs: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/851520
Original-Revision: b46106e0baab0bf4419c71aaeea1f8812ed66044
GitOrigin-RevId: 9160bbcff0d6075797bd982d8616c7567b134fa6
Change-Id: I1f5957c5c69dbec251acd51c024b60bff543423b
diff --git a/stem b/stem
index 953e0e5..78882d3 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="df183fa284c081bf8959a210a18618df24e861ce"/>
+             revision="b46106e0baab0bf4419c71aaeea1f8812ed66044"/>
   </projects>
   <hooks>
     <hook name="install-environment"