[Bug Report] Introduction to JumpStart - Text to Image (TypeError)

**Link to the notebook**
[notebook link.
](https://github.com/aws/amazon-sagemaker-examples/blob/main/introduction_to_amazon_algorithms/jumpstart_text_to_image/Amazon_JumpStart_Text_To_Image.ipynb)

**Describe the bug**
. While running through the demo notebook ‘model-txt2img-stabilityai-stable-diffusion-v2-1-base-SDK_2’ there appears to be a TypeError with one of the functions defined (‘parse_response’); it assumes a string is being passed in but the previous function (‘query’) is returning a dictionary already.

```
def query(model_predictor, text):
"""Query the model predictor."""

encoded_text = text.encode("utf-8")

query_response = model_predictor.predict(
encoded_text,
{
"ContentType": "application/x-text",
"Accept": "application/json",
},
)
return query_response

def parse_response(query_response):
"""Parse response and return generated image and the prompt"""

response_dict = json.loads(query_response) ##### query response is already dict
return response_dict["generated_image"], response_dict["prompt"]
```

**To reproduce**
Execute notebook as is returns TypeError: the JSON object must be str, bytes or bytearray, not dict