test: update description

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

Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/sdsnanmeanors/test/test.js

@@ -88,7 +88,7 @@ tape( 'if provided an empty ndarray, the function returns `NaN`', function test(
 	t.end();
 });
 
-tape( 'if every indexed element is `NaN`, the function returns `NaN`', function test( t ) {
+tape( 'if every element is `NaN`, the function returns `NaN`', function test( t ) {
 	var x;
 	var v;