Docs: Add missing `null` allowed type for the `$id` parameter of `wp_set_current_user()`.

Props andy-schmidt.
See #53399.

Built from https://develop.svn.wordpress.org/trunk@52208


git-svn-id: http://core.svn.wordpress.org/trunk@51800 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/pluggable.php

@@ -20,9 +20,9 @@ if ( ! function_exists( 'wp_set_current_user' ) ) :
 	 *
 	 * @global WP_User $current_user The current user object which holds the user data.
 	 *
-	 * @param int    $id   User ID
-	 * @param string $name User's username
-	 * @return WP_User Current user User object
+	 * @param int|null $id   User ID.
+	 * @param string   $name User's username.
+	 * @return WP_User Current user User object.
 	 */
 	function wp_set_current_user( $id, $name = '' ) {
 		global $current_user;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52207';
+$wp_version = '5.9-alpha-52208';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.