node: Fix sync test.

node/src/chain_spec/mod.rs

@@ -311,6 +311,9 @@ pub(crate) mod tests {
                 get_authority_keys_from_seed("Alice").0,
                 get_authority_keys_from_seed("Bob").0,
                 get_authority_keys_from_seed("Charlie").0,
+                get_authority_keys_from_seed("Alice").1,
+                get_authority_keys_from_seed("Bob").1,
+                get_authority_keys_from_seed("Charlie").1,
             ],
             initial_members::none(),
             forum_config::empty(get_account_id_from_seed::<sr25519::Public>("Alice")),