Fix colorFrom in theme space readmes

[abidlabs]

As pointed out by @coyotte508, we use an invalid colorFrom in the theme space readmes, which is preventing theme spaces from returning the tags correctly.

This changes orange to red

cc @freddyaboulton @Wauplin

[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview
	Website	ready!	Website preview
	Storybook	ready!	Storybook preview
	Visual tests	all good!	Build review
🦄	Changes	detected!	Details

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Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/55a7963cb63eec13100a2b4a5d0bda299f6448ae/gradio-4.1.2-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@55a7963cb63eec13100a2b4a5d0bda299f6448ae#subdirectory=client/python"

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
gradio	patch

• Maintainers can select this checkbox to manually select packages to update.

With the following changelog entry.

Fix colorFrom in theme space readmes

Maintainers or the PR author can modify the PR title to modify this entry.

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• If the bot has failed to detect any changes, or if this pull request needs to update multiple packages to different versions or requires a more comprehensive changelog entry, maintainers can update the changelog file directly.

[abidlabs]

Thanks @freddyaboulton