benchmark: calibrate util.inspect-proxy

According to nodejs/performance#186
this benchmark takes 0.47 minute to run a single run.
So using calibrate-n script it suggests reduce it from 1e5 to 1e2

Author: brunocroh

benchmark/util/inspect-proxy.js

@@ -4,7 +4,7 @@ const util = require('util');
 const common = require('../common.js');
 
 const bench = common.createBenchmark(main, {
-  n: [1e5],
+  n: [100],
   showProxy: [0, 1],
   isProxy: [0, 1],
 });