Docs: Correct alignment for rest_insert_attachment action DocBlock.

Follow-up to [39348].

Props krupalpanchal.
See #61608.

git-svn-id: https://develop.svn.wordpress.org/trunk@58865 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

@@ -339,8 +339,7 @@ protected function insert_attachment( $request ) {
 		 *
 		 * @since 4.7.0
 		 *
-		 * @param WP_Post         $attachment Inserted or updated attachment
-		 *                                    object.
+		 * @param WP_Post         $attachment Inserted or updated attachment object.
 		 * @param WP_REST_Request $request    The request sent to the API.
 		 * @param bool            $creating   True when creating an attachment, false when updating.
 		 */