fix: config change to reflect entity action plugins (#355)

New (generic/derived) plugins were added in the course of 8.6 development (see https://www.drupal.org/project/drupal/issues/2670730, CR https://www.drupal.org/node/2934349). The update hooks don't seem to have caught this necessary configuration change.

On an existing site running `drush cedit system.action.node_delete_action` (and exporting this change) or changing the configuration in `config/sync/system.action.node_delete_action.yml`

Author: frega

config/sync/system.action.node_delete_action.yml

@@ -6,5 +6,5 @@ dependencies:
 id: node_delete_action
 label: 'Delete content'
 type: node
-plugin: node_delete_action
+plugin: 'entity:delete_action:node'
 configuration: {  }