GAN Gradio Guide: Adjustments to iframe heights

[NimaBoscarino]

Description

As a follow-up to #1000, this PR adjusts the heights of the iframes so that they are an appropriate size (not too big, and no scroll bars).

I haven't been able to deploy the front-end locally to verify this (my laptop is having some issues!) but I manually altered the iframe heights in the HTML for https://gradio.app/create_your_own_friends_with_a_gan/ to pick appropriate heights.

Checklist:

• I have performed a self-review of my own code
• My code follows the style guidelines of this project
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[aliabd]

LGTM

In case it helps, there are the steps to launch the website:

To launch run sh scripts/build_frontend.sh and then sh scripts/launch_website.sh, website will be running on localhost:8000
To have the website live reload just run npm run start on a separate terminal from scripts/launch_website.sh.