Update sync-protocol.md

Author: dapplion

specs/altair/light-client/sync-protocol.md

@@ -204,7 +204,7 @@ def is_better_update(new_update: LightClientUpdate, old_update: LightClientUpdat
     new_has_supermajority = new_num_active_participants * 3 >= max_active_participants * 2
     old_has_supermajority = old_num_active_participants * 3 >= max_active_participants * 2
     if new_has_supermajority != old_has_supermajority:
-        return new_has_supermajority > old_has_supermajority
+        return new_has_supermajority
     if not new_has_supermajority and new_num_active_participants != old_num_active_participants:
         return new_num_active_participants > old_num_active_participants