Update benchmark.js

Signed-off-by: Lokesh Ranjan <lokesh.ranjan.phe23@itbhu.ac.in>

Author: Lokeshranjan8

lib/node_modules/@stdlib/stats/base/dists/arcsine/ctor/benchmark/benchmark.js

@@ -32,7 +32,7 @@ var Arcsine = require( './../lib' );
 
 // MAIN //
 
-bench( format( '%s:instantiation', pkg ), function benchmark( bm ) {
+bench( format( '%s::instantiation', pkg ), function benchmark( bm ) {
 	var dist;
 	var len;
 	var a;