[roll] Roll fuchsia [diagnostics][reader][cpp] Interpret structured keys

Original-Fixed: b/300181458
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/918353
Original-Revision: 6d49f286631fc17a9294d4cba68d1d7a9f63d4d1
GitOrigin-RevId: cf330d3ac82ce729c16d13028bb7703c73b0c932
Change-Id: I1d5bc5392442a839914a23c3868e6aa6c8e68ca0
diff --git a/stem b/stem
index 6f6e4dc..98e6e2a 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="51ffc6e5e44fe07d75823eafe52b34c376e592e3"/>
+             revision="6d49f286631fc17a9294d4cba68d1d7a9f63d4d1"/>
   </projects>
   <hooks>
     <hook name="install-environment"