Docs: Fix return_value() inline documentation

Author: rollybueno

src/Config_Command.php

@@ -1035,9 +1035,9 @@ private static function fetch_remote_salts( $insecure = false ) {
 	 *
 	 * @param string $name
 	 * @param string $type
-	 * @param string $type
+	 * @param array $values
 	 * @param string $wp_config_file_name Config file name
-	 * @return string The value of the requested constant or variable as defined in the wp-config.php file; if the
+	 * @return mixed The value of the requested constant or variable as defined in the wp-config.php file; if the
 	 *                requested constant or variable is not defined then the function will print an error and exit.
 	 */
 	private function return_value( $name, $type, $values, $wp_config_file_name ) {