Fix ValueError in Controlling the Reload demo

[jedick]

Description

This PR changes the lambda function in the demo to return a value whose type is compatible with the gr.Label() output component.

The changed code uses dictionary comprehension to convert the list of dict with label and score keys returned by pipe() to a {Dict[str, float]} of classes and confidences used by gr.Label() to show classes and confidence bars.

Example of the value before this change. The list was the immediate cause of the ValueError:

s = "hooray"
pipe(s)
# [{'label': 'positive', 'score': 0.9420903325080872}]

Example of the value after this change. The dict has the class as key and confidence score as value:

s = "hooray"
{d["label"]: d["score"] for d in pipe(s)}
# {'positive': 0.9420903325080872}

Closes: #11170

[freddyaboulton]

Thanks @jedick !

[gradio-pr-bot]

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