benchmark: update iterations of benchmark/domain/domain-fn-args.js

[lucshi]

Fixes: #50571

Found 40% regression on node20 compared with older version:
benchmark@benchmark-S2600WFT:/luc/node_new$ /home/benchmark/.nvm/versions/node/v16.20.2/bin/node benchmark/domain/domain-fn-args.js
domain/domain-fn-args.js n=10 args=0: 59,126.81519322643
domain/domain-fn-args.js n=10 args=1: 55,949.690038717185
domain/domain-fn-args.js n=10 args=2: 49,182.34353866962
domain/domain-fn-args.js n=10 args=3: 58,395.18356525954

benchmark@benchmark-S2600WFT:~/luc/node_new$ /home/benchmark/.nvm/versions/node/v20.11.1/bin/node benchmark/domain/domain-fn-args.js
domain/domain-fn-args.js n=10 args=0: 38,578.609704063485
domain/domain-fn-args.js n=10 args=1: 38,735.66780291292
domain/domain-fn-args.js n=10 args=2: 39,472.645456698505
domain/domain-fn-args.js n=10 args=3: 39,021.49694266571