docs: fix description

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/ndarray/flatten/lib/main.js

@@ -45,7 +45,7 @@ var format = require( '@stdlib/string/format' );
 * @param {ndarray} x - input ndarray
 * @param {Object} [options] - function options
 * @param {NonNegativeInteger} [options.depth] - number of dimensions to flatten
-* @param {String} [options.order] - order of the output ndarray
+* @param {string} [options.order='row-major'] - order in which input ndarray elements are flattened
 * @throws {TypeError} first argument must be an ndarray-like object
 * @throws {TypeError} options argument must be an object
 * @throws {TypeError} options.depth must be a nonnegative integer