fix up README graphs

README.md

@@ -127,13 +127,15 @@ linkStyle default opacity:0.5
   network_controller --> base_controller;
   network_controller --> controller_utils;
   network_controller --> eth_json_rpc_provider;
+  network_controller --> json_rpc_engine;
   notification_controller --> base_controller;
   notification_services_controller --> base_controller;
   notification_services_controller --> controller_utils;
   notification_services_controller --> keyring_controller;
   notification_services_controller --> profile_sync_controller;
   permission_controller --> base_controller;
   permission_controller --> controller_utils;
+  permission_controller --> json_rpc_engine;
   permission_controller --> approval_controller;
   permission_log_controller --> base_controller;
   permission_log_controller --> json_rpc_engine;
@@ -151,6 +153,7 @@ linkStyle default opacity:0.5
   profile_sync_controller --> network_controller;
   queued_request_controller --> base_controller;
   queued_request_controller --> controller_utils;
+  queued_request_controller --> json_rpc_engine;
   queued_request_controller --> network_controller;
   queued_request_controller --> selected_network_controller;
   rate_limit_controller --> base_controller;