netlink: specs: rt-link: missed broadcast-neigh

Add missed broadcast-neigh.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20260603150331.1919611-3-louis.scalbert@6wind.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/specs/rt-link.yaml

@@ -1353,6 +1353,9 @@ attribute-sets:
       -
         name: coupled-control
         type: u8
+      -
+        name: broadcast-neigh
+        type: u8
   -
     name: bond-ad-info-attrs
     name-prefix: ifla-bond-ad-info-