benchmarks: fix lint error

33c242e7e9 introduced a linting error with indentation

PR-URL: https://github.com/nodejs/node/pull/6314
Reviewed-By: James M Snell <jasnell@gmail.com>

benchmark/misc/console.js

@@ -114,7 +114,7 @@ function main(conf) {
     case 'restAndConcat':
       if (conf.concat)
         runUsingRestAndConcat(n);
-    break;
+      break;
     default:
       throw new Error('Unexpected method');
   }