fixed link to '30 built-in components' in readme and quickstart markdowns

[yvrjsharma]

Description

The hyperlink labeled 30 built-in components leads to a '404: Not found' error. This issue occurs in two locations:

• README.md
• guides/01_getting-started/01_quickstart.md

This PR replaces the incorrect link with - https://www.gradio.app/docs/gradio/components

Closes: #(issue)

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[gradio-pr-bot]

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[gradio-pr-bot]

🦄 no changes detected

This Pull Request does not include changes to any packages.

__No changes detected. __

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[pngwn]

Looks great! Thanks @yvrjsharma!

[yvrjsharma]

Thanks @pngwn !