Clarify the process for publishing an action to the marketplace when you are not an organization owner

[felicitymay]

Why:

Closes: #20784

This update is intended to clarify the behavior of the UI if the user is not the owner of an organization.

The note has turned out a little longer than I'd hoped. Feel free to tell me that this would be better as an additional step instead.

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

Add a note to clarify that for repositories in an organization, only an organization owner can see a link to accept the agreement.

Check off the following:

• I have reviewed my changes in staging, available via the View deployment link in this PR's timeline.

  • For content changes, you will also see an automatically generated comment with links directly to pages you've modified. The comment won't appear if your PR only edits files in the data directory.

• For content changes, I have completed the self-review checklist.

[github-actions]

Automatically generated comment ℹ️

This comment is automatically generated and will be overwritten every time changes are committed to this branch.

The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
actions/creating-actions/publishing-actions-in-github-marketplace.md	fpt ghec	fpt ghec

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server
ghae: GitHub AE

[github-actions]

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