REST API: Fix the wrong name in the comments controller

It should be `embeddable` not `embedded`.
Follow-up [53138].

Props timothyblynjacobs.
See #55505.



Built from https://develop.svn.wordpress.org/trunk@53139


git-svn-id: http://core.svn.wordpress.org/trunk@52728 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php

@@ -1196,8 +1196,8 @@ class WP_REST_Comments_Controller extends WP_REST_Controller {
 			$rest_url = add_query_arg( $args, rest_url( $this->namespace . '/' . $this->rest_base ) );
 
 			$links['children'] = array(
-				'href'     => $rest_url,
-				'embedded' => true,
+				'href'       => $rest_url,
+				'embeddable' => true,
 			);
 		}