fix: drev benchmark - use @stdlib/string/format per RFC #8647

Author: Amansingh0807

lib/node_modules/@stdlib/blas/ext/base/ndarray/drev/benchmark/benchmark.js

@@ -94,7 +94,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg + ':len=' + len, f );
+		bench( format( '%s:len=%d', pkg, len ), f );
 	}
 }