[roll] Roll fuchsia [flutter] add html dependency

This appears needed to roll flutter past
https://github.com/flutter/flutter/commit/d4b68984786ddf2615c01ce8c8aa1.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/874882
Original-Revision: 8c9c74f995b903ed5d2860284afc334020382966
GitOrigin-RevId: cf94181562eea823027f1466d6e59cfe1ed9bd54
Change-Id: Iaa9420bd81b7a0b5ac8ca3501fb6512aa88303e2
diff --git a/stem b/stem
index 32889c7..61eb865 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="d19d225fb61baecb084c0c0b16d130108dfa25d3"/>
+             revision="8c9c74f995b903ed5d2860284afc334020382966"/>
   </projects>
   <hooks>
     <hook name="install-environment"