update benchmark.js

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

Author: hrshya

lib/node_modules/@stdlib/stats/base/dists/chi/stdev/benchmark/benchmark.js

@@ -39,7 +39,7 @@ bench( pkg, function benchmark( b ) {
 	opts = {
 		'dtype': 'float64'
 	};
-	x = uniform( 100, EPS, 20.0, opts );
+	k = uniform( 100, EPS, 20.0, opts );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {