Query: Allow queries by wp_dashboard_recent_posts() to be cached.

Set the `cache_results` argument to `true` for `WP_Query` to ensure the posts queries on the dashboard can also be cached.

Props benjgrolleau.
Fixes #57055.

git-svn-id: https://develop.svn.wordpress.org/trunk@55895 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/dashboard.php

@@ -982,7 +982,7 @@ function wp_dashboard_recent_posts( $args ) {
 		'order'          => $args['order'],
 		'posts_per_page' => (int) $args['max'],
 		'no_found_rows'  => true,
-		'cache_results'  => false,
+		'cache_results'  => true,
 		'perm'           => ( 'future' === $args['status'] ) ? 'editable' : 'readable',
 	);