I18N: Remove `<code>` tags in an error message in `WP_REST_Posts_Controller::get_item_schema()` for consistency with other strings.

Follow-up to [48610].

See #50759.

git-svn-id: https://develop.svn.wordpress.org/trunk@48613 602fd350-edb4-49c9-b593-d223f7449a82

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

@@ -2430,7 +2430,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 				sprintf(
 					/* translators: %s: register_rest_field */
 					__( 'Please use %s to add new schema properties.' ),
-					'<code>register_rest_field<code>'
+					'register_rest_field'
 				),
 				'5.4.0'
 			);