[roll] Roll fuchsia [netstack3] Update TODOs

Update TODOs to reference unified IGMPv3/MLDv2 tracking bug.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1167793
Original-Revision: 35599b2e829b9799e945cb734f3661b52874ae63
GitOrigin-RevId: 0df2e8278332b1b4b90cbd9bd72bb19eb60a9def
Change-Id: I576bb95a22104bd15c69acbf85a4c89100b09b5a
diff --git a/stem b/stem
index 0b92d5e..220b053 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="abd4d8dddf5f34d9bca89b750fe3d74644cbb572"/>
+             revision="35599b2e829b9799e945cb734f3661b52874ae63"/>
   </projects>
   <hooks>
     <hook name="install-environment"