benchmark: lower URL.canParse runs

PR-URL: nodejs/node#47351
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

graal-nodejs/benchmark/url/whatwgurl-canParse.js

@@ -3,7 +3,7 @@ const common = require('../common.js');
 
 const bench = common.createBenchmark(main, {
   type: Object.keys(common.urls),
-  n: [25e6],
+  n: [1e6],
 });
 
 function main({ type, n }) {