plugin updates

wp/wp-config-sample.php

@@ -64,6 +64,12 @@ define( 'NONCE_SALT',       'put your unique phrase here' );
  *
  * 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, database tables are created with the specified prefix.
+ * 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 = 'wp_';