benchmark: fix input passed to subtle.digest in webcrypto-digest

The data is already a random Buffer, so passing it through
TextEncoder decoded it as UTF-8 and re-encoded it, making
subtle.digest hash a different and larger input than createHash.

Signed-off-by: RafaelGSS <rafael.nunu@hotmail.com>
PR-URL: #66608
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: RafaelGSS

benchmark/crypto/webcrypto-digest.js

@@ -33,8 +33,6 @@ function measureLegacy(n, data, method) {
 }
 
 function measureSubtle(n, data, method) {
-  const ec = new TextEncoder();
-  data = ec.encode(data);
   const jobs = new Array(n);
   bench.start();
   for (let i = 0; i < n; i++)