Update README.md

README.md

@@ -59,8 +59,8 @@ test_reader = paddle.batch(paddle.reader.shuffle(
     paddle.dataset.uci_housing.test(), buf_size=500), batch_size=1)
 
 for data in test_reader():
-    fetch_map = client.predict(feed={"x": data[0][0]}, fetch=["y"])
-    print("{} {}".format(fetch_map["y"][0], data[0][1][0]))
+    fetch_map = client.predict(feed={"x": data[0][0]}, fetch=["price"])
+    print("{} {}".format(fetch_map["price"][0], data[0][1][0]))
 
 ```