Rollback import_full_config to false.

The problem was the wrong package_import_url.

Author: ellull

firmware/fan-controller-v1.yaml

@@ -10,7 +10,7 @@ external_components:
 
 dashboard_import:
   package_import_url: github://ellull/fan-controller/firmware/fan-controller-v1.yaml@v1
-  import_full_config: true
+  import_full_config: false
 
 esphome:
   name: ${name}