test: update description

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/ndarray/to-string/test/test.js

@@ -202,7 +202,7 @@ tape( 'the function serializes an ndarray as a string (0d)', function test( t )
 	t.end();
 });
 
-tape( 'the function serializes an ndarray as a string (dtype=complex)', function test( t ) {
+tape( 'the function serializes an ndarray as a string (dtype=complex64)', function test( t ) {
 	var expected;
 	var strides;
 	var actual;