Update extra.py

extra.py

@@ -24,6 +24,8 @@
 ## Enable installed plugins. Add the name of each plugin to the list.
 # from netbox.configuration.configuration import PLUGINS
 # PLUGINS.append('my_plugin')
+
+from netbox.configuration.configuration import PLUGINS
 PLUGINS.append('netbox_qrcode')
 
 ## Plugins configuration settings. These settings are used by various plugins that the user may have installed.