test(emqx_bridge_v2_SUITE): fix incorrect assumption about return type

This commit fixes an incorrect assumption about the return type of
emqx_bridge_v2:lookup/2 in emqx_bridge_v2_SUITE:t_load_config_success/1.

apps/emqx_bridge/test/emqx_bridge_v2_SUITE.erl

@@ -667,8 +667,8 @@ t_load_config_success(_Config) ->
     ),
     ?assertMatch(
         {ok, #{
-            type := BridgeType,
-            name := BridgeName,
+            type := BridgeTypeBin,
+            name := BridgeNameBin,
             raw_config := #{<<"some_key">> := <<"new_value">>},
             resource_data := #{}
         }},