[roll] Roll fuchsia Revert "[net-cli] No prefix length required for IPv6 addr"

This reverts commit 8c4a5bffef13598d1643f9201e0ffc316127e5b8.

Reason for revert: Reversing decision to have IPv6 addresses without prefixes (https://fxbug.dev/98955)

Original-Bug: 98955
Original-Bug: 93072

Original change's description:
> [net-cli] No prefix length required for IPv6 addr
>
> Makes prefix length argument of `if addr add` optional in the case where
> you are adding an IPv6 address and skipping adding a subnet route
> for the address (--no_subnet_route).
>
> Original-Fixed: 93072
> Test: fx test net-cli-tests
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/653126

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/676222
Original-Revision: eda2a37f948e70ceaa8ada119ccc6213a3d299a0
GitOrigin-RevId: 18c47a7fc8dc7d93f4ea0f8946b525838da8b433
Change-Id: I8375bd6526cc1c34746a9fedb6d31cc96ef8b73e
diff --git a/stem b/stem
index 3afea62..d44f552 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="c3a3911a4392145c07949a3630a0fb3f1fed5ca8"/>
+             revision="eda2a37f948e70ceaa8ada119ccc6213a3d299a0"/>
   </projects>
   <hooks>
     <hook name="install-environment"