Remove no workflow files prerequisite

[tommoor]

Why:

Closes: #43228

What's being changed (if available, include any code snippets, screenshots, or gifs):

I removed the incorrect prerequisite

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

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Source	Review	Production	What Changed
actions/how-tos/create-and-publish-actions/publish-in-github-marketplace.md	fpt ghec	fpt ghec

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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[Copilot]

Pull request overview

Removes an inaccurate prerequisite from the “Publishing actions in GitHub Marketplace” article, aligning the documentation with actual requirements for publishing actions.

Changes:

• Removed the prerequisite stating that action repositories must not contain workflow files.

[Sharra-writes]

@tommoor This is definitely something I'll have to confirm.

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A stale label has been added to this pull request because it has been open 30 days with no activity. If you think this pull request should remain open, please add a new comment.

[hesreallyhim]

I commented in the related issue but I don't know whether those comments are being tracked, so I will repeat here, apologies if it's redundant:

I agree this is a confusing requirement. There examples in GitHub's own repos (e.g. https://github.com/actions/setup-node) that appear to contradict it. And even this GitHub docs page (https://docs.github.com/en/actions/how-tos/create-and-publish-actions/release-and-maintain-actions) appears to recommend the use of workflows for maintaining actions. The statement that it is enforced is also plainly false, at least on the natural reading. Thanks.

[Sharra-writes]

@tommoor @hesreallyhim I confirmed this list item shouldn't be here. It was probably trying to say something else, but no one thinks it matters enough to track down what it was trying to say, so deleting it is fine. I'll get this approved.

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