fix typo in example_5_pytorch_worker.py (#28)

Author: Separius

hpbandster/examples/example_5_pytorch_worker.py

@@ -268,7 +268,7 @@ def number_of_parameters(self):
 
 
 if __name__ == "__main__":
-	worker = KerasWorker(run_id='0')
+	worker = PyTorchWorker(run_id='0')
 	cs = worker.get_configspace()
 
 	config = cs.sample_configuration().get_dictionary()