Fixes method to resolve the root URLs

[abidlabs]

There was a mistake in how we were updating the root url, so that they weren't being updated correctly after the first time, which was leading to issues like this: #7531

Test with:

import gradio as gr

with gr.Blocks() as demo:
    gr.Audio("https://file-examples.com/storage/fe98e6ab1965df346a899de/2017/11/file_example_MP3_700KB.mp3")
    
demo.launch(share=True)

Fixes: #7531
Fixes: #7566

[gradio-pr-bot]

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---

Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/c167a1fa84c3534ad953f3739f858bb9e91d18e8/gradio-4.19.2-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@c167a1fa84c3534ad953f3739f858bb9e91d18e8#subdirectory=client/python"

[gradio-pr-bot]

🦄 change detected

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Fixes method to resolve the root URLs

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[abidlabs]

This test was wrong which is why we didn't notice this bug sooner (this is what I get for not paying close enough attention to GH Copilot's output)

[yvrjsharma]

This fixes #7566 as well. Thanks @abidlabs

[yvrjsharma]

This resolves #7566 Thanks @abidlabs !