bench: refactor to use string interpolation in array/base/filled5d-by

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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---

Author: JavaTypedScript

lib/node_modules/@stdlib/array/base/filled5d-by/benchmark/benchmark.size.js

@@ -25,6 +25,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var floor = require( '@stdlib/math/base/special/floor' );
 var isArrayArray = require( '@stdlib/assert/is-array-array' );
 var constantFunction = require( '@stdlib/utils/constant-function' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var filled5dBy = require( './../lib' );
 
@@ -92,7 +93,7 @@ function main() {
 		N = floor( pow( pow( 10, i ), 1.0/5.0 ) );
 
 		f = createBenchmark( N );
-		bench( pkg+'::equidimensional:size='+(N*N*N*N*N), f );
+		bench( format( '%s::equidimensional:size=%d', pkg, N*N*N*N*N ), f );
 	}
 }