Increase testing code coverage for required init action check in ability categories registry

Author: gziolo

src/wp-includes/rest-api/endpoints/class-wp-rest-abilities-v1-list-controller.php

@@ -294,7 +294,7 @@ public function get_item_schema(): array {
 					'description' => __( 'Meta information about the ability.' ),
 					'type'        => 'object',
 					'properties'  => array(
-						'annotations'   => array(
+						'annotations' => array(
 							'description' => __( 'Annotations for the ability.' ),
 							'type'        => array( 'boolean', 'null' ),
 							'default'     => null,