benchmark: swap var for let in url benchmarks

In benchmark url directory this changes for loops using var to let
when it applies for consistency

PR-URL: https://github.com/nodejs/node/pull/28867
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/benchmark/url/usvstring.js b/benchmark/url/usvstring.js
index 91abe8d673..37141ff551 100644
--- a/benchmark/url/usvstring.js
+++ b/benchmark/url/usvstring.js
@@ -21,7 +21,7 @@ function main({ input, n }) {
   const str = inputs[input];
 
   bench.start();
-  for (var i = 0; i < n; i++)
+  for (let i = 0; i < n; i++)
     toUSVString(str);
   bench.end(n);
 }