Docs: Add missing duplicate hook comment for `user_request_key_expiration` filter.

Props birgire, desrosj.
Fixes #43934.
Built from https://develop.svn.wordpress.org/trunk@43168


git-svn-id: http://core.svn.wordpress.org/trunk@42997 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/user.php

@@ -753,6 +753,7 @@ function _wp_personal_data_handle_actions() {
  * @access private
  */
 function _wp_personal_data_cleanup_requests() {
+	/** This filter is documented in wp-includes/user.php */
 	$expires        = (int) apply_filters( 'user_request_key_expiration', DAY_IN_SECONDS );
 	$requests_query = new WP_Query( array(
 		'post_type'      => 'user_request',

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43166';
+$wp_version = '5.0-alpha-43168';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.