Resync wp-config comments with upstream

- WordPress/WordPress@2597c1b

Author: tianon

beta/php8.1/apache/wp-config-docker.php

@@ -92,6 +92,12 @@ function getenv_docker($env, $default) {
  *
  * You can have multiple installations in one database if you give each
  * a unique prefix. Only numbers, letters, and underscores please!
+ *
+ * At the installation time, DB tables names with $table_prefix are created.
+ * Changing this value after WordPress is installed will make your site think
+ * it has not been installed.
+ *
+ * @link https://developer.wordpress.org/advanced-administration/wordpress/wp-config/#table-prefix
  */
 $table_prefix = getenv_docker('WORDPRESS_TABLE_PREFIX', 'wp_');