bench: refactor to use string interpolation in array/base/filter

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

Author: JavaTypedScript

lib/node_modules/@stdlib/array/base/filter/benchmark/benchmark.length.js

@@ -25,6 +25,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var isArray = require( '@stdlib/assert/is-array' );
 var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
 var zeroTo = require( '@stdlib/array/base/zero-to' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var filter = require( './../lib' );
 
@@ -90,7 +91,7 @@ function main() {
 		len = pow( 10, i );
 
 		f = createBenchmark( len );
-		bench( pkg+':dtype=generic,len='+len, f );
+		bench( format( '%s:dtype=generic,len=%d', pkg, len ), f );
 	}
 }