Docs: Add a `@since` note to `register_rest_route()` about the `_doing_it_wrong()` notice when the required `permission_callback` argument is not set.

Follow-up to [48526].

Props psykro.
Fixes #51060.
Built from https://develop.svn.wordpress.org/trunk@48827


git-svn-id: http://core.svn.wordpress.org/trunk@48589 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api.php

@@ -20,7 +20,8 @@ define( 'REST_API_VERSION', '2.0' );
  * Note: Do not use before the {@see 'rest_api_init'} hook.
  *
  * @since 4.4.0
- * @since 5.1.0 Added a _doing_it_wrong() notice when not called on or after the rest_api_init hook.
+ * @since 5.1.0 Added a `_doing_it_wrong()` notice when not called on or after the `rest_api_init` hook.
+ * @since 5.5.0 Added a `_doing_it_wrong()` notice when the required `permission_callback` argument is not set.
  *
  * @param string $namespace The first URL segment after core prefix. Should be unique to your package/plugin.
  * @param string $route     The base URL for route you are adding.

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-48826';
+$wp_version = '5.6-alpha-48827';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.