update readme

candle-examples/examples/rnn/README.md

@@ -22,7 +22,7 @@ Add argument `--test` to run test of this example.
 $ cargo run --example rnn --release -- --test
 ```
 
-Test models are generated by Pytorch [LSTM](https://pytorch.org/docs/stable/generated/torch.nn.LSTM.html) and [GRU](https://pytorch.org/docs/stable/generated/torch.nn.GRU.html). These models include input and output tensors and can be downloaded from [here](https://huggingface.co/kigichang/test_rnn).
+Test models are generated with reference to the Pytorch examples [LSTM](https://pytorch.org/docs/stable/generated/torch.nn.LSTM.html) and [GRU](https://pytorch.org/docs/stable/generated/torch.nn.GRU.html). These models include input and output tensors and can be downloaded from [here](https://huggingface.co/kigichang/test_rnn).
 
 Test models are generated by the following codes: