Update nspanel_esphome_core.yaml

'name_add_mac_suffix' was not declared error

esphome/nspanel_esphome_core.yaml

@@ -1706,7 +1706,7 @@ text_sensor:
     internal: false
     disabled_by_default: false
     lambda: |-
-      if !(${name_add_mac_suffix}) {
+      if !(${pre_built}) {
         return {"${name}"};
         } else {
         byte mac[6];