Merge pull request #69 from y0z/feature/update-readme-example

Update example in README

Author: nabenabe0928

README.md

@@ -43,14 +43,14 @@ import optunahub
 
 
 def objective(trial: optuna.Trial) -> float:
-    x = trial.suggest_float("x", 0, 1)
+  x = trial.suggest_float("x", -5, 5)
+  y = trial.suggest_float("y", -5, 5)
+  return x**2 + y**2
 
-    return x
 
-
-mod = optunahub.load_module("samplers/simulated_annealing")
-study = optuna.create_study(sampler=mod.SimulatedAnnealingSampler())
-study.optimize(objective, n_trials=20)
+module = optunahub.load_module(package="samplers/auto_sampler")
+study = optuna.create_study(sampler=module.AutoSampler())
+study.optimize(objective, n_trials=10)
 
 print(study.best_trial.value, study.best_trial.params)
 ```