Fix: Remove Unnecessary Comma in Private Forks Documentation

[Sriparno08]

Why:

There is an unnecessary comma in the private-repository-forks-overview.md document.

Version: fpt (Free, Pro, or Team plans)

Closes #22494

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

I have removed the unnecessary comma in the private-repository-forks-overview.md document.

GitHub URL: https://github.com/github/docs/blob/main/data/reusables/actions/private-repository-forks-overview.md#L0-L1

GitHub Docs URL: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/enabling-features-for-your-repository/managing-github-actions-settings-for-a-repository

Check off the following:

• [x] I have reviewed my changes in staging (look for the "Automatically generated comment" and click the links in the "Preview" column to view your latest changes).
• [x] For content changes, I have completed the self-review checklist.

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[cmwilson21]

@Sriparno08 Thanks for submitting a PR! Per this comment, the comma is still necessary for certain versions of documentation and needs to be versioned for those instances. Can you update the PR to include the necessary versioning? You can find out more about our Liquid helpers for versioning here.

[Sriparno08]

Updated it, @cmwilson21!

[Sriparno08]

Correctly said, @lecoursen 👍

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