Create a file in the WP root directory called force-minor-update.php and call it via your web browser.
Use this code:
require( dirname(__FILE__) . '/wp-load.php' );
//Clear transients
global $wpdb;
$sql = "DELETE FROM $wpdb->options WHERE option_name LIKE '_transient_%'";
$clean = $wpdb->query( $sql );
//Clear object cache
wp_cache_flush();
//Attempt auto update
wp_maybe_auto_update();