bench: refactor to use string interpolation in wasm

PR-URL: #11588
Reviewed-by: Athan Reines <kgryte@gmail.com>
Ref: #8647
Closes: stdlib-js/metr-issue-tracker#439

Author: anandkaranubc

lib/node_modules/@stdlib/wasm/module-wrapper/benchmark/benchmark.js

@@ -21,13 +21,14 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var Module = require( './../lib' );
 
 
 // MAIN //
 
-bench( pkg+'::constructor', function benchmark( b ) {
+bench( format( '%s::constructor', pkg ), function benchmark( b ) {
 	var out;
 	var i;